fixed 7fc05ee2 from https://gitee.com/pssea/graphic_ui/pulls/574

Description: fix code issue
IssueNo: https://gitee.com/openharmony/graphic_ui/issues/I4OME9
Feature or Bugfix: Feature
Binary Source:No
Signed-off-by: Nlizhiqi <lizhiqi1@huawei.com>

frameworks/dfx/ui_screenshot.cpp

@@ -41,7 +41,7 @@ public:
                          ImagePixelFormat format, uint32_t stride) override
     {
         if ((virAddr == nullptr) || ((format != IMAGE_PIXEL_FORMAT_ARGB1555) &&
-            (format != IMAGE_PIXEL_FORMAT_ARGB8888))) {
+            (format != IMAGE_PIXEL_FORMAT_ARGB8888)) || (width == 0) || (height == 0)) {
             return;
         }