bug#6114: 23.1; grep-read-files does incorrect wildcard match

[S Boucher]

This bug is for (defun grep-read-files (regexp) in file grep.el.

In grep-read-files, there's a call to (wildcard-to-regexp (cdr alias))
with the assumption that (cdr alias) is a single pattern.  However,
the variable grep-files-aliases actually can have multiple patterns
for each alias.  So, the multi-pattern aliases, such as for "cc",
cannot correctly match:

(defcustom grep-files-aliases
  '(("asm" .    "*.[sS]")
    ("c" .     "*.c")
    ("cc" .    "*.cc *.cxx *.cpp *.C *.CC *.c++")
    ... etc...


In GNU Emacs 23.1.1 (i686-pc-linux-gnu, GTK+ Version 2.16.1)
 of 2009-11-24 on stephbuntu
Windowing system distributor `The X.Org Foundation', version 11.0.10600000
configured using `configure  '--prefix=/ws/EMACS/soft''

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: en_CA.UTF-8
  value of $XMODIFIERS: nil
  locale-coding-system: utf-8-unix
  default-enable-multibyte-characters: t

Major mode: Lisp Interaction

Minor modes in effect:
  shell-dirtrack-mode: t
  dynamic-completion-mode: t
  tooltip-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  global-auto-composition-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
C-p

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