setup_git_directory(): check repository format version.

After figuring out the GIT_DIR location, make sure the
repository is of the right vintage, by calling
check_repository_format(). .

Signed-off-by: Junio C Hamano <junkio@cox.net>

setup.c

@@ -173,5 +173,6 @@ int check_repository_format(void)
 const char *setup_git_directory(void)
 {
 	const char *retval = setup_git_directory_1();
+	check_repository_format();
 	return retval;
 }