Fix a win32.raw32 platform compile bug caused by the windows headers not being included

drivers/multiple/Win32/gdisp_lld_Win32.c

@@ -451,8 +451,8 @@ typedef struct winPriv {
 	#endif
 } winPriv;
 
-void gfxEmulatorSetParentWindow(HWND hwnd) {
-	hWndParent = hwnd;
+void gfxEmulatorSetParentWindow(void *hwnd) {
+	hWndParent = (HWND)hwnd;
 }
 
 #if GFX_USE_GINPUT && GINPUT_NEED_MOUSE

drivers/multiple/Win32/gdisp_lld_config.h

@@ -51,7 +51,7 @@
 // Passing a NULL will reset window creation to creating top level windows.
 // Note: In order to affect any static displays it must be called BEFORE gfxInit().
 // Note: Creating a window under a parent causes the Mouse to be disabled by default (rather than enabled as for a top window)
-void gfxEmulatorSetParentWindow(HWND hwnd);
+void gfxEmulatorSetParentWindow(void *hwnd);
 
 #if GINPUT_NEED_MOUSE
 	// This function allows you to inject mouse events into the ugfx mouse driver