[mm-common] Add missing backslash escape

[Daniel Elstner <daniel src gnome org>]

commit d91546f0a71c2cbf9c09996b7df6882c0a97fc0b
Author: Daniel Elstner <daniel kitta gmail com>
Date:   Fri Aug 21 22:44:19 2009 +0200

    Add missing backslash escape
    
    * util/mm-common-prepare.in: Insert a missing backslash to escape
    another backslash within a double-quoted sed script.  Apparently it
    accidentally worked even without proper escaping.

 util/mm-common-prepare.in |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/util/mm-common-prepare.in b/util/mm-common-prepare.in
index 1346873..e796747 100644
--- a/util/mm-common-prepare.in
+++ b/util/mm-common-prepare.in
@@ -79,7 +79,7 @@ test -f "$acfile" || {
 # Extract the directory macro arguments from configure.ac
 s='	 ' # tab+space
 auxdir=`sed -n "s/^[$s]*AC_CONFIG_AUX_DIR([[$s]*\\([^])\$,$s]*\\).*/\\1/p" "$acfile"`
-doctooldir=`sed -n "s/^[$s]*MM_CONFIG_DOCTOOL_DIR([[$s]*\\([^])\$,$s]*\\).*/\1/p" "$acfile"`
+doctooldir=`sed -n "s/^[$s]*MM_CONFIG_DOCTOOL_DIR([[$s]*\\([^])\$,$s]*\\).*/\\1/p" "$acfile"`
 
 auxdir="$srcdir${auxdir:+/}$auxdir"
 echo "$progname: putting auxiliary files in '$auxdir'."