ControllerInterface: Get rid of SetHwnd(), introduce Reinitialize()

Initialize now just takes the handle directly. Reinitialize is added because it is much more straightforward in comparison to doing the Shutdown-Initialize manually.

Source/Core/Core/HW/GCPad.cpp

@@ -40,8 +40,7 @@ void Initialize(void* const hwnd)
 	for (unsigned int i=0; i<4; ++i)
 		s_config.controllers.push_back(new GCPad(i));
 
-	g_controller_interface.SetHwnd(hwnd);
-	g_controller_interface.Initialize();
+	g_controller_interface.Initialize(hwnd);
 
 	// load the saved controller config
 	s_config.LoadConfig(true);

Source/Core/Core/HW/Wiimote.cpp

@@ -44,9 +44,7 @@ void Initialize(void* const hwnd, bool wait)
 	for (unsigned int i = WIIMOTE_CHAN_0; i<MAX_BBMOTES; ++i)
 		s_config.controllers.push_back(new WiimoteEmu::Wiimote(i));
 
-
-	g_controller_interface.SetHwnd(hwnd);
-	g_controller_interface.Initialize();
+	g_controller_interface.Initialize(hwnd);
 
 	s_config.LoadConfig(false);