Implemented better testing and fixed skipepd frames

Source/Components/Interfaces/UDPStream/UDPSServer.cpp

@@ -268,6 +268,7 @@ void UDPSServer::ServiceClients() {
             }
             // Non-blocking peek
             int fd = tcpClients[i]->GetReadHandle();
+            if (fd < 0 || fd >= FD_SETSIZE) { continue; /* HI-6: skip FDs outside select range */ }
             fd_set rset;
             FD_ZERO(&rset);
             FD_SET(fd, &rset);
@@ -303,6 +304,7 @@ void UDPSServer::ServiceClients() {
             return;
         }
         int fd = serverSocket.GetReadHandle();
+        if (fd < 0 || fd >= FD_SETSIZE) { return; /* HI-6 */ }
         fd_set rset;
         FD_ZERO(&rset);
         FD_SET(fd, &rset);