add set nullptr before uicontent destroy

Signed-off-by: zcdqs <junfeng.lijunfeng@huawei.com>
Change-Id: I968162916966e6e43b3dba400eaf2130b7c25dbf

wm/include/window_impl.h

@@ -253,7 +253,11 @@ private:
     }
     inline void NotifyBeforeDestroy(std::string windowName)
     {
-        CALL_UI_CONTENT(Destroy);
+        if (uiContent_ != nullptr) {
+            auto uiContent = std::move(uiContent_);
+            uiContent_ = nullptr;
+            uiContent->Destroy();
+        }
         if (notifyNativefunc_) {
             notifyNativefunc_(windowName);
         }