Makes UDPSOCKET_SENDTO_INVALID part of the netsocket extended test set

Author: Veijo Pesonen

TESTS/netsocket/udp/main.cpp

@@ -90,6 +90,7 @@ Case cases[] = {
         Case("UDPSOCKET_OPEN_LIMIT", UDPSOCKET_OPEN_LIMIT),
         Case("UDPSOCKET_SENDTO_TIMEOUT", UDPSOCKET_SENDTO_TIMEOUT),
 #ifdef MBED_EXTENDED_TESTS
+        Case("UDPSOCKET_SENDTO_INVALID", UDPSOCKET_SENDTO_INVALID),
         Case("UDPSOCKET_ECHOTEST", UDPSOCKET_ECHOTEST),
         Case("UDPSOCKET_ECHOTEST_BURST", UDPSOCKET_ECHOTEST_BURST),
         Case("UDPSOCKET_ECHOTEST_BURST_NONBLOCK", UDPSOCKET_ECHOTEST_BURST_NONBLOCK),