submodule-config: fix test binary crashing when no arguments given

hvoigt · gitster · commit 55cbe18e1146 · 2016-07-28T13:05:36.000-07:00
Since arg[0] will be NULL without any argument here and starts_with()
does not like NULL-pointers.

Signed-off-by: Heiko Voigt &lt;hvoigt@hvoigt.net&gt;
Reviewed-by: Stefan Beller &lt;sbeller@google.com&gt;
Signed-off-by: Junio C Hamano &lt;gitster@pobox.com&gt;
diff --git a/test-submodule-config.c b/test-submodule-config.c
@@ -23,7 +23,7 @@ int main(int argc, char **argv)
 
 	arg++;
 	my_argc--;
-	while (starts_with(arg[0], "--")) {
+	while (arg[0] && starts_with(arg[0], "--")) {
 		if (!strcmp(arg[0], "--url"))
 			output_url = 1;
 		if (!strcmp(arg[0], "--name"))
