shdocvw: Abort pending tasks on DocHost destruction.

dlls/shdocvw/dochost.c

@@ -62,6 +62,16 @@ LRESULT process_dochost_tasks(DocHost *This)
     return 0;
 }
 
+static void abort_dochost_tasks(DocHost *This)
+{
+    task_header_t *task, *cursor;
+
+    LIST_FOR_EACH_ENTRY_SAFE(task, cursor, &This->task_queue, task_header_t, entry) {
+        list_remove(&task->entry);
+        task->destr(task);
+    }
+}
+
 static void notif_complete(DocHost *This, DISPID dispid)
 {
     DISPPARAMS dispparams;
@@ -876,6 +886,7 @@ void DocHost_Init(DocHost *This, IDispatch *disp, const IDocHostContainerVtbl* c
 
 void DocHost_Release(DocHost *This)
 {
+    abort_dochost_tasks(This);
     release_dochost_client(This);
     DocHost_ClientSite_Release(This);