sequencer: always commit without editing when asked for

Previously, we only called run_git_commit() without EDIT_MSG when we also
passed in a default message.

However, an upcoming caller will want to commit without EDIT_MSG and
*without* a default message: to clean up fixup/squash comments in HEAD's
commit message.

Let's prepare for that.

Signed-off-by: Johannes Schindelin <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: dscho

sequencer.c

@@ -716,6 +716,8 @@ static int run_git_commit(const char *defmsg, struct replay_opts *opts,
 		argv_array_pushf(&cmd.args, "-S%s", opts->gpg_sign);
 	if (defmsg)
 		argv_array_pushl(&cmd.args, "-F", defmsg, NULL);
+	else if (!(flags & EDIT_MSG))
+		argv_array_pushl(&cmd.args, "-C", "HEAD", NULL);
 	if ((flags & CLEANUP_MSG))
 		argv_array_push(&cmd.args, "--cleanup=strip");
 	if ((flags & EDIT_MSG))