Don't poll irrlicht device without graphics

It fixed crashes for joystick event which does XResetScreenSaver

src/guiengine/engine.cpp

@@ -1425,9 +1425,12 @@ namespace GUIEngine
         // This will avoid no response in windows, also allow showing loading
         // icon in apple device, because apple device only update render
         // buffer if you poll the mainloop
+        if (!ProfileWorld::isNoGraphics())
+        {
             g_device->setEventReceiver(NULL);
             g_device->run();
             g_device->setEventReceiver(EventHandler::get());
+        }
 
         // If launch is finished, pause & display the story mode timers
         if ( !launching)

src/main_loop.cpp

@@ -641,8 +641,9 @@ void MainLoop::renderGUI(int phase, int loop_index, int loop_size)
 #ifdef SERVER_ONLY
     return;
 #else
-    if (NetworkConfig::get()->isNetworking() &&
-        NetworkConfig::get()->isServer()         )
+    if ((NetworkConfig::get()->isNetworking() &&
+        NetworkConfig::get()->isServer()) ||
+        ProfileWorld::isNoGraphics())
     {
         return;
     }