bug#11785: 24.1; term-mode doesn't respect first color change from a process

[Michael Hoffman]

A small test file will demonstrate this problem:

$ cat test.sh
#!/usr/bin/env bash
echo -e "\E[31mRed \E[32mGreen"

When running this, I expect to get "Red" in red and "Green" in green.

Running `emacs -Q --eval '(ansi-term "./test.sh")' with Emacs 24 results
in "Red" in black (not red as expected) and "Green" in green. Doing this
with Emacs 23.1 results in the expected behavior ("Red" in red).

In GNU Emacs 24.1.2 (x86_64-unknown-linux-gnu, GTK+ Version 2.10.4)
 of 2012-06-21 on rhel5-x64.grid.gs.washington.edu
Windowing system distributor `The X.Org Foundation', version 11.0.70101000
Configured using:
 `configure '--without-gif' '--with-x' '--with-x-toolkit=gtk'
 '--prefix=/net/gs/vol3/software/modules-sw/emacs/24.1/Linux/RHEL5/x86_64''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: en_US
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: @im=SCIM
  locale-coding-system: iso-latin-1-unix
  default enable-multibyte-characters: t

Major mode: Lisp Interaction

Minor modes in effect:
  tooltip-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
M-x r e p o r <tab> <return>

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.

Load-path shadows:
None found.

Features:
(shadow sort gnus-util mail-extr emacsbug message format-spec rfc822 mml
easymenu mml-sec mm-decode mm-bodies mm-encode mail-parse rfc2231
mailabbrev gmm-utils mailheader sendmail regexp-opt rfc2047 rfc2045
ietf-drums mm-util mail-prsvr mail-utils time-date tooltip ediff-hook
vc-hooks lisp-float-type mwheel x-win x-dnd tool-bar dnd fontset image
fringe lisp-mode register page menu-bar rfn-eshadow timer select
scroll-bar 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 minibuffer loaddefs button faces cus-face files text-properties
overlay sha1 md5 base64 format env code-pages mule custom widget
hashtable-print-readable backquote make-network-process dynamic-setting
font-render-setting move-toolbar gtk x-toolkit x multi-tty emacs)