git.el: find the git-status buffer whatever its name is

git-status used the buffer name to find git-status buffers, and that
can fail if the buffer has another name, for example when multiple
working directories is tracked.

Signed-off-by: Rémi Vanicat <vanicat@debian.org>
Acked-by: Alexandre Julliard <julliard@winehq.org>
Tested-by: Xavier Maillard <xma@gnu.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

contrib/emacs/git.el

@@ -1432,7 +1432,7 @@ Commands:
         (with-current-buffer buffer
           (when (and list-buffers-directory
                      (string-equal fulldir (expand-file-name list-buffers-directory))
-                     (string-match "\\*git-status\\*$" (buffer-name buffer)))
+		     (eq major-mode 'git-status-mode))
             (setq found buffer))))
       (setq list (cdr list)))
     found))