tc_util: Drop needless pointer check

The function parse_action_control_slash() returns early if 'p' is NULL,
so after the first call to action_a2n(), 'p' is guaranteed not to be
NULL. Otherwise, the assignment '*p = 0' above would dereference the
NULL pointer already anyway, so just drop this check here.

Signed-off-by: Phil Sutter <phil@nwl.cc>

tc/tc_util.c

@@ -630,8 +630,7 @@ int parse_action_control_slash(int *argc_p, char ***argv_p,
 							 allow_num);
 	*p = 0;
 	if (action_a2n(*argv, &result1, allow_num)) {
-		if (p)
-			*p = '/';
+		*p = '/';
 		return -1;
 	}