TT#14008 fix warning as `value` cannot be NULL

Change-Id: I011eacbd95fafc7f5d13a40851753acc448ef2fc
Warned-by: coverity

daemon/call_interfaces.c

@@ -1141,7 +1141,7 @@ static void call_ng_main_flags(struct sdp_ng_flags *out, str *key, bencode_item_
 		case CSH_LOOKUP("received-from"):
 			if (value->type != BENCODE_LIST)
 				break;
-			if (value && (it = value->child)) {
+			if ((it = value->child)) {
 				bencode_get_str(it, &out->received_from_family);
 				bencode_get_str(it->sibling, &out->received_from_address);
 			}