[WIN32SS] Add IntGoGhost function (stub) (#1081)

CORE-11944

win32ss/user/ntuser/ghost.c

@@ -0,0 +1,18 @@
+/*
+ * PROJECT:     ReactOS user32.dll
+ * LICENSE:     GPL-2.0-or-later (https://spdx.org/licenses/GPL-2.0-or-later)
+ * PURPOSE:     Ghost window handling
+ * COPYRIGHT:   Copyright 2018 Katayama Hirofumi MZ (katayama.hirofumi.mz@gmail.com)
+ */
+
+#include <win32k.h>
+
+BOOL FASTCALL IntGoGhost(PWND Window, BOOL bGo)
+{
+    // TODO:
+    // 1. Create a thread.
+    // 2. Create a ghost window in the thread.
+    // 3. Do message loop in the thread
+    STUB;
+    return FALSE;
+}