Libretro buildfix

Core/WebServer.cpp

@@ -826,8 +826,10 @@ static void WebServerThread() {
 		// launches us (Tools/wsdbg --launch) has to learn the port from our output before it can
 		// connect to anything, so that one line must not be losable to a log level, a disabled
 		// channel, or a build that never installs a log output at all.
+#if !defined(__LIBRETRO__)
 		fprintf(stderr, "Debugger listening on port %d\n", g_Config.iRemoteISOPort);
 		fflush(stderr);
+#endif
 
 		g_OSD.Show(OSDType::MESSAGE_SUCCESS, "Debugger web server running on port " + std::to_string(g_Config.iRemoteISOPort), 5.0f, "debugger");
 		g_OSD.SetClickCallback("debugger", []() {