git.el: Allow to commit even if there are no marked files.

This can be useful to commit a merge that didn't result in any
changes.

Signed-off-by: Alexandre Julliard <julliard@winehq.org>

contrib/emacs/git.el

@@ -895,8 +895,6 @@ Return the list of files that haven't been handled."
               (unless (git-empty-db-p)
                 (setq head (git-rev-parse "HEAD")
                       head-tree (git-rev-parse "HEAD^{tree}")))
-              (if files
-                  (progn
               (message "Running git commit...")
               (when
                   (and
@@ -917,7 +915,6 @@ Return the list of files that haven't been handled."
                         (message "Committed %s." commit)
                         (git-run-hook "post-commit" nil)))
                   (message "Commit aborted."))))
-                (message "No files to commit.")))
           (delete-file index-file))))))