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

Since arg[0] will be NULL without any argument here and starts_with()
does not like NULL-pointers.

Signed-off-by: Heiko Voigt <hvoigt@hvoigt.net>
Reviewed-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/test-submodule-config.c b/test-submodule-config.c
index dab8c27768160d4cfa61c41a95004eb7a8a336b6..a4e4098a0fc55f804524e4333a4e1685e38ad2a8 100644 (file)
--- 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"))