lok: don't post events on disposed window

Change-Id: I7721380b1bb6e9ec21338a72523326d0cae6729e
Reviewed-on: https://gerrit.libreoffice.org/51778Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Miklos Vajna <vmiklos@collabora.co.uk>

include/vcl/ITiledRenderable.hxx

@@ -101,6 +101,9 @@ public:
     static void LOKPostAsyncEvent(void* pEv, void*)
     {
         LOKAsyncEventData* pLOKEv = static_cast<LOKAsyncEventData*>(pEv);
+        if (pLOKEv->mpWindow->IsDisposed())
+            return;
+
         switch (pLOKEv->mnEvent)
         {
         case VCLEVENT_WINDOW_KEYINPUT:

sw/source/uibase/uno/unotxdoc.cxx

@@ -3492,7 +3492,7 @@ void SwXTextDocument::postKeyEvent(int nType, int nCharCode, int nKeyCode)
     SolarMutexGuard aGuard;
 
     VclPtr<vcl::Window> pWindow = getDocWindow();
-    if (!pWindow)
+    if (!pWindow || pWindow->IsDisposed())
         return;
 
     LOKAsyncEventData* pLOKEv = new LOKAsyncEventData;