fix the logic part

Author: songmeo

libcanard/canard.c

@@ -1388,11 +1388,15 @@ int8_t canardRxSubscribe(struct CanardInstance* const       ins,
     int8_t       out = -CANARD_ERROR_INVALID_ARGUMENT;
     const size_t tk  = (size_t) transfer_kind;
 
-    if (port_id < PORT_ID_MINIMUM)  // port_id can't be over 65535 because it exceeds type unsigned short maximum value.
+    if (tk == 0 && port_id > CANARD_SUBJECT_ID_MAX)
     {
-        (void) fprintf(stderr, "Invalid port: %d. Port should be within 49152 to 65535\n", port_id);
-        exit(EXIT_FAILURE);
+        return out;
     }
+    if (port_id > CANARD_SERVICE_ID_MAX)
+    {
+        return out;
+    }
+
     if ((ins != NULL) && (out_subscription != NULL) && (tk < CANARD_NUM_TRANSFER_KINDS))
     {
         // Reset to the initial state. This is absolutely critical because the new payload size limit may be larger