[embedlite] Return a valid pointer, also if GetPlatformImage() return…

…ed false.

JB#28040

embedding/embedlite/EmbedLiteView.cpp

@@ -386,7 +386,7 @@ void*
 EmbedLiteView::GetPlatformImage(int* width, int* height)
 {
   NS_ENSURE_TRUE(mViewImpl, nullptr);
-  void* aImage;
+  void* aImage = 0;
   mViewImpl->GetPlatformImage(&aImage, width, height);
   return aImage;
 }