oss-fuzz: mark unused argv/argc argument

The dummy fuzz cmd_main() does not look at its argc/argv parameters
(since it should never even be run), but has to match the usual
cmd_main() declaration.

Mark them to silence -Wunused-parameter.

Signed-off-by: Jeff King <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: peff

oss-fuzz/dummy-cmd-main.c

@@ -8,7 +8,7 @@
  * executed.
  */
 
-int cmd_main(int argc, const char **argv) {
+int cmd_main(int argc UNUSED, const char **argv UNUSED) {
 	BUG("We should not execute cmd_main() from a fuzz target");
 	return 1;
 }