bug#10313: 24.0.92; configure fails to find include path on openbsd

[Manuel Giraud <manuel@ledu-giraud.fr>]

On OpenBSD, running ./configure fails to find some libraries (libjpeg,
libpng,...) that are correctly installed (via package system). The
following patch fixes this bug but I don't know if it is the right place
to do it.

--- configure.in.orig	Fri Dec 16 11:30:34 2011
+++ configure.in	Fri Dec 16 11:24:36 2011
@@ -478,6 +478,7 @@
       sparc*)    machine=sparc ;;
       vax-*)     machine=vax ;;
     esac
+    CPPFLAGS="-I/usr/local/include"
   ;;
 
   ## Apple Darwin / Mac OS X



In GNU Emacs 24.0.92.1 (i386-unknown-openbsd5.0, GTK+ Version 2.24.8)
 of 2011-12-16 on K
Windowing system distributor `The X.Org Foundation', version 11.0.11102000
Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: fr_FR.UTF-8
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: nil
  value of $XMODIFIERS: nil
  locale-coding-system: utf-8-unix
  default enable-multibyte-characters: t

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  font-lock-mode: t
  blink-cursor-mode: t
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  line-number-mode: t
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-- 
Manuel Giraud