cast input for socket create

Author: JacobBarthelmeh

examples/mqttnet.c

@@ -431,7 +431,7 @@ static int NetConnect(void *context, const char* host, word16 port,
             return MQTT_CODE_ERROR_NETWORK;
     #endif
             status = nx_tcp_socket_create(sock->ipPtr, &sock->fd,
-                                           "MQTT Socket", NX_IP_NORMAL,
+                                           (CHAR*)"MQTT Socket", NX_IP_NORMAL,
                                            NX_FRAGMENT_OKAY, NX_IP_TIME_TO_LIVE,
                                            1024, NX_NULL, NX_NULL);
             if (status != NX_SUCCESS) {