Added support for multiple input device types for KeyMap and connected Qt.

src/video_core/video_core.h

@@ -27,6 +27,7 @@ static const int kScreenBottomHeight    = 240;  ///< 3DS bottom screen height
 
 extern RendererBase*   g_renderer;              ///< Renderer plugin
 extern int             g_current_frame;         ///< Current frame
+extern EmuWindow*      g_emu_window;            ///< Emu window
 
 /// Start the video core
 void Start();