Fix warning on nextion hw

MK/module/nextion/NexHardware.cpp

@@ -65,7 +65,7 @@ bool recvRetNumber(uint32_t *number, uint32_t timeout)
         && temp[7] == 0xFF
         )
     {
-        *number = (temp[4] << 24) | (temp[3] << 16) | (temp[2] << 8) | (temp[1]);
+        *number = ((uint32_t)temp[4] << 24) | ((uint32_t)temp[3] << 16) | ((uint32_t)temp[2] << 8) | ((uint32_t)temp[1]);
         ret = true;
     }