bug#8013: 23.2.93; png not available

[Uday S Reddy <u.s.reddy@cs.bham.ac.uk>]

(image-type-availablep 'png) returns nil.  In the same environment,
Emacs 23.2 and 23.2.91 return t.  But 23.2.92 and 23.2.93 are returning
nil. 

My installation has GnuWin32's libpng library.  Here is a listing of the
directory:

  c:/GnuWin32/lib:
  total used in directory 621 available 659656
  drwxrwxrwx  1 udr None      0 01-30 19:06 .
  drwxrwxrwx  1 udr None      0 01-30 18:48 ..
  -rw-rw-rw-  1 udr None  12800 2005-05-15  jpeg-bcc.lib
  -rw-rw-rw-  1 udr None   3568 2005-05-15  jpeg.def
  -rw-rw-rw-  1 udr None  24220 2005-05-15  jpeg.lib
  -rw-rw-rw-  1 udr None  64620 2005-05-15  libjpeg.dll.a
  -rw-rw-rw-  1 udr None  29696 2009-06-04  libpng-bcc.lib
  -rw-rw-rw-  1 udr None 148640 2009-06-04  libpng.dll.a
  -rw-rw-rw-  1 udr None    995 01-30 19:05 libpng.la
  -rw-rw-rw-  1 udr None  51878 2009-06-04  libpng.lib
  -rw-rw-rw-  1 udr None   4645 2009-06-04  libpng12.def
  -rw-rw-rw-  1 udr None 148706 2009-06-04  libpng12.dll.a
  -rw-rw-rw-  1 udr None    995 01-30 19:05 libpng12.la
  -rw-rw-rw-  1 udr None  77534 2005-07-20  libz.a
  -rw-rw-rw-  1 udr None  43738 2005-07-20  libz.dll.a
  drwxrwxrwx  1 udr None      0 01-30 19:05 pkgconfig
  -rw-rw-rw-  1 udr None   6656 2005-07-20  zlib-bcc.lib
  -rw-rw-rw-  1 udr None   1868 2005-07-20  zlib.def
  -rw-rw-rw-  1 udr None  14778 2005-07-20  zlib.lib

Cheers,
Uday
-------


In GNU Emacs 23.2.93.1 (i386-mingw-nt5.1.2600)
 of 2011-02-01 on 3249CTO
Windowing system distributor `Microsoft Corp.', version 5.1.2600
configured using `configure --with-gcc (4.4) --no-opt --cflags -Ic:/imagesupport/include'

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: ENU
  value of $XMODIFIERS: nil
  locale-coding-system: cp1252
  default enable-multibyte-characters: t

Major mode: VM Presentation

Minor modes in effect:
  shell-dirtrack-mode: t
  savehist-mode: t
  which-function-mode: t
  tooltip-mode: t
  mouse-wheel-mode: t
  use-hard-newlines: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  blink-cursor-mode: t
  auto-encryption-mode: t
  line-number-mode: t
  visual-line-mode: t
  transient-mark-mode: t

Recent input:
c d c d c d c d c d c d c d c d c d d d d d d d c c 
d c d <switch-frame> <down-mouse-1> <mouse-1> <escape> 
. i m a g e - f s f e m a c s - 2 1 <return> <escape> 
: ( v m - i m a g e - t y p e - a v a i l a b l e - 
p SPC ' p n g ) <return> <escape> : <up> C-e C-b C-b 
C-b C-b C-d C-d C-d j p e g <return> <switch-frame> 
c c c c c c C-x c <return> c c c c SPC SPC SPC <backspace> 
C-l C-x o C-l M-v M-v M-v M-v C-v C-v C-v C-p D <switch-frame> 
<down-mouse-1> <mouse-1> <escape> . <return> <escape> 
. f o <backspace> r o b - i m a g e <return> C-l C-l 
C-x b v m . SPC o SPC <return> C-p C-p C-p C-f C-f 
C-f C-f C-f <escape> . <return> <help-echo> <help-echo> 
<down-mouse-1> <mouse-movement> <mouse-1> ` C-; C-9 
u C-x u C-x u <escape> : <up> <return> <down-mouse-1> 
<mouse-1> <switch-frame> <down-mouse-1> <mouse-movement> 
<mouse-1> <f1> g M-x v m - q u i t <return> g M-n M-n 
M-n SPC SPC SPC SPC s c o n f e r e n c e s . m <return> 
p SPC SPC SPC <down-mouse-1> <mouse-1> <down-mouse-3> 
<down-mouse-1> <mouse-1> <down-mouse-1> <mouse-1> <down-mouse-2> 
<mouse-2> <down-mouse-1> <mouse-1> <wheel-up> <double-wheel-up> 
<wheel-down> <wheel-up> <double-wheel-up> D D SPC SPC 
SPC SPC D p n p n Q y M-x v m <return> <f1> M-n M-n 
SPC p n Q M-x v m <return> n <down-mouse-1> <mouse-1> 
M-x r e p o r t - e m SPC SPC b SPC <return>

Recent messages:
Generating summary... 0
Sorting messages... done
Generating summary... 0
Sorting messages... done
Expunging messages in cache... 
Sorting messages... done
Expunging messages in cache... done
6761 messages, 7 new, 764 unread, 11 deleted [2 times]
Decoding MIME message... done
Making completion list...

Load-path shadows:
d:/Home/udr/share/emacs/sml-mode hides d:/gnu/emacs-23.2.93/../site-lisp/sml-mode
d:/Home/udr/share/emacs/savehist-20+ hides d:/gnu/emacs-23.2.93/../site-lisp/savehist-20+
d:/gnu/emacs-23.2.93/../site-lisp/longlines hides d:/gnu/emacs-23.2.93/lisp/longlines
d:/Home/udr/share/emacs/rnews hides d:/gnu/emacs-23.2.93/lisp/obsolete/rnews

Features:
(shadow sort message ecomplete mml mml-sec password-cache mm-decode
mm-bodies mm-encode mailcap nnheader gmm-utils mailheader canlock
hashcash emacsbug org-wl org-w3m org-vm org-rmail org-mhe org-mew
org-irc org-jsinfo org-infojs org-html org-exp org-exp-blocks org-agenda
org-info org-gnus org-bibtex org-bbdb org byte-opt warnings bytecomp
byte-compile org-footnote org-src org-list org-faces org-compat org-macs
noutline outline texinfo cus-edit cus-start cus-load debug cl-specs
edebug pp mule-util vm-mark ediff-merg ediff-diff ediff-wind ediff-help
ediff-util ediff-mult ediff-init ediff vc vc-dispatcher make-mode
ansi-color shell multi-isearch help-mode view info smtpmail flyspell
ispell newcomment mail-utils mailalias vm-reply longlines easy-mmode
vm-delete bbdb-hooks mail-parse rfc2231 rfc2047 rfc2045 qp ietf-drums
mm-util mail-prsvr w3m-form w3m browse-url doc-view dired-x dired-aux
mydired dired image-mode w3m-hist w3m-fb w3m-ems wid-edit w3m-ccl ccl
w3m-favicon w3m-image w3m-proc w3m-util vm-w3m vm-pop tapestry vm-sort
vm-thread vm-crypto vm-imap easymenu vc-bzr sha1 hex-util etags my-vm
ps-print ps-def lpr vm-save vm-ps-print vm-rfaddons vm-menu vm-window
vm-toolbar vm-folder vm-mime vm-undo vm-virtual vm-summary-faces
vm-mouse vm-page vm-minibuf vm-message vm-misc vm-macro bbdb-vm vm-vars
vm-summary vm-motion vm-autoload bbdb-snarf mail-extr rfc822 bbdb-com
advice help-fns advice-preload mailabbrev cl cl-19 vm-version vm server
w3m-load bbdb-autoloads bbdb timezone vm-autoloads savehist tex-site
tex-mik telnet movement natural-space NatSpeak sendmail auth-source
gnus-util netrc time-date epa-file epa epg epg-config ange-ftp
regexp-opt comint ring echistory chistory ehelp electric derived
which-func imenu edmacro kmacro jka-compr tooltip ediff-hook vc-hooks
lisp-float-type mwheel dos-w32 disp-table ls-lisp w32-win w32-vars
tool-bar dnd fontset image fringe lisp-mode register page menu-bar
rfn-eshadow timer select scroll-bar mldrag mouse jit-lock font-lock
syntax facemenu font-core frame cham georgian utf-8-lang misc-lang
vietnamese tibetan thai tai-viet lao korean japanese hebrew greek
romanian slovak czech european ethiopic indian cyrillic chinese
case-table epa-hook jka-cmpr-hook help simple abbrev loaddefs button
minibuffer faces cus-face files text-properties overlay md5 base64
format env code-pages mule custom widget hashtable-print-readable
backquote make-network-process multi-tty emacs)

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