setting eshell histsize from environment

[Philipp Haselwarter <philipp.haselwarter@gmx.de>]

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I just started a eshell, but it went a little wrong:

--8<---------------cut here---------------start------------->8---
Debugger entered--Lisp error: (wrong-type-argument wholenump "100000")
  make-vector("100000" nil)
  make-ring("100000")
  eshell-hist-initialize()
  eshell-mode()
  eshell(nil)
  call-interactively(eshell t nil)
  execute-extended-command(nil)
  call-interactively(execute-extended-command nil nil)
--8<---------------cut here---------------end--------------->8---

so…


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--- em-hist.el.original	2011-12-01 22:36:08.000000000 +0100
+++ em-hist.el	2011-12-01 22:37:22.788838131 +0100
@@ -261,7 +261,7 @@
 
   (make-local-variable 'eshell-history-size)
   (or eshell-history-size
-      (setq eshell-history-size (getenv "HISTSIZE")))
+      (setq eshell-history-size (string-to-number (getenv "HISTSIZE"))))
 
   (make-local-variable 'eshell-history-file-name)
   (or eshell-history-file-name

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GNU Emacs 24.0.91.1 (x86_64-unknown-linux-gnu, GTK+ Version 2.24.8) of
2011-11-19 (also occurs on a built of today)

The actual reason I resorted to `eshell' was that `ansi-term' failed me
when I attached to screen: My screenrc displays the time in the
hardstatus ( [ %d.%m %c:%s ] ), which makes ansi-term "jump" every
second. Any ideas on that?


-- 
Philipp Haselwarter