Added SDL_GameControllerUpdate().

include/SDL_gamecontroller.h

@@ -160,6 +160,15 @@ extern DECLSPEC SDL_Joystick *SDLCALL SDL_GameControllerGetJoystick(SDL_GameCont
  */
 extern DECLSPEC int SDLCALL SDL_GameControllerEventState(int state);
 
+/**
+ *  Update the current state of the open game controllers.
+ *  
+ *  This is called automatically by the event loop if any game controller
+ *  events are enabled.
+ */
+extern DECLSPEC void SDLCALL SDL_GameControllerUpdate(void);
+
+
 /**
  *  The list of axii available from a controller
  */

src/joystick/SDL_gamecontroller.c

@@ -824,6 +824,16 @@ SDL_GameControllerOpen(int device_index)
     return (gamecontroller);
 }
 
+/*
+ * Manually pump for controller updates.
+ */
+void
+SDL_GameControllerUpdate(void)
+{
+    /* Just for API completeness; the joystick API does all the work. */
+    SDL_JoystickUpdate();
+}
+
 
 /*
  * Get the current state of an axis control on a controller