ice transport: ignore EPENDING in UDP

Change-Id: Id74b251686266dbe2a75ad01e1b58ba0a4b4501d

src/ice_transport.cpp

@@ -1230,7 +1230,7 @@ IceTransport::send(int comp_id, const unsigned char* buf, size_t len)
     }
     pj_ssize_t sent_size = 0;
     auto status = pj_ice_strans_sendto2(pimpl_->icest_.get(), comp_id+1, buf, len, remote.pjPtr(), remote.getLength(), &sent_size);
-    if (status == PJ_EPENDING) {
+    if (status == PJ_EPENDING && isTCPEnabled()) {
         auto current_size = sent_size;
         // NOTE; because we are in TCP, the sent size will count the header (2
         // bytes length).