gdiplus: Add a stub implementation of GdiplusNotificationHook and GdiplusNotificationUnhook.

dlls/gdiplus/gdiplus.c

@@ -100,6 +100,18 @@ Status WINAPI GdiplusStartup(ULONG_PTR *token, const struct GdiplusStartupInput
     return Ok;
 }
 
+GpStatus WINAPI GdiplusNotificationHook(ULONG_PTR *token)
+{
+    FIXME("%p\n", token);
+    return NotificationHook(token);
+}
+
+void WINAPI GdiplusNotificationUnhook(ULONG_PTR token)
+{
+    FIXME("%ld\n", token);
+    return NotificationUnhook(token);
+}
+
 /*****************************************************
  *      GdiplusShutdown [GDIPLUS.@]
  */

dlls/gdiplus/gdiplus.spec

@@ -624,7 +624,7 @@
 @ stub GdipWarpPath
 @ stub GdipWidenPath
 @ stub GdipWindingModeOutline
-@ stub GdiplusNotificationHook
-@ stub GdiplusNotificationUnhook
+@ stdcall GdiplusNotificationHook(ptr)
+@ stdcall GdiplusNotificationUnhook(ptr)
 @ stdcall GdiplusShutdown(ptr)
 @ stdcall GdiplusStartup(ptr ptr ptr)