build: Fix building with newer GCC.

Newer GCC is upset that the features flags are uninitialized.
Zero them out so it is less upset.

Change-Id: I05162699e1b36bce4145f58a63b47ad19c6975ac

main/features.c

@@ -3722,14 +3722,12 @@ static int feature_interpret(struct ast_channel *chan, struct ast_channel *peer,
 
 	char dynamic_features_buf[128];
 	const char *peer_dynamic_features, *chan_dynamic_features;
-	struct ast_flags features;
+	struct ast_flags features = { 0, };
 	struct ast_call_feature feature;
 	if (sense == FEATURE_SENSE_CHAN) {
-		/* Coverity - This uninit_use should be ignored since this macro initializes the flags */
 		ast_copy_flags(&features, &(config->features_caller), AST_FLAGS_ALL);
 	}
 	else {
-		/* Coverity - This uninit_use should be ignored since this macro initializes the flags */
 		ast_copy_flags(&features, &(config->features_callee), AST_FLAGS_ALL);
 	}