Make struct commands[] const to save a couple bytes

index 4e10581..d0a2042 100644
@@ -238,7 +238,7 @@ struct cmd_struct {
 	int option;
 };
 
-static int run_command(struct cmd_struct *p, int argc, const char **argv)
+static int run_command(const struct cmd_struct *p, int argc, const char **argv)
 {
 	int status;
 	struct stat st;

@@ -283,7 +283,7 @@ static int run_command(struct cmd_struct *p, int argc, const char **argv)
 static void handle_internal_command(int argc, const char **argv)
 {
 	const char *cmd = argv[0];
-	static struct cmd_struct commands[] = {
+	static const struct cmd_struct commands[] = {
 		{ "add", cmd_add, RUN_SETUP | NEED_WORK_TREE },
 		{ "annotate", cmd_annotate, RUN_SETUP },
 		{ "apply", cmd_apply },

@@ -375,7 +375,7 @@ static void handle_internal_command(int argc, const char **argv)
 	}
 
 	for (i = 0; i < ARRAY_SIZE(commands); i++) {
-		struct cmd_struct *p = commands+i;
+		const struct cmd_struct *p = commands+i;
 		if (strcmp(p->cmd, cmd))
 			continue;
 		exit(run_command(p, argc, argv));