QNativeSocketEngine: remove compile watning on Windows

Remove warning of unused variable.

Change-Id: Ia361dcb9081cd47c7018f5e75cdb8eb74f5474d4
Reviewed-by: Shane Kearns <shane.kearns@accenture.com>

src/network/socket/qnativesocketengine_win.cpp

@@ -338,6 +338,8 @@ bool QNativeSocketEnginePrivate::createNewSocket(QAbstractSocket::SocketType soc
             BOOL handleFlags = SetHandleInformation((HANDLE)socket, HANDLE_FLAG_INHERIT, 0);
 #ifdef QNATIVESOCKETENGINE_DEBUG
             qDebug() << "QNativeSocketEnginePrivate::createNewSocket - set inheritable" << handleFlags;
+#else
+            Q_UNUSED(handleFlags);
 #endif
         }
 #endif