ZoneCode: Add Action on loading a GfxImage to set the loadedSize property to 0 to indicate Texture data has not yet been loaded

src/ZoneCodeGenerator/Generating/Templates/ZoneLoad.stg

@@ -206,6 +206,10 @@ void $LoaderClassName(context.Asset)$::LoadPtr_$structure.Type.Name$(const bool
             Load_$structure.Type.Name$(true);
             $endif$
 
+            $if(structure.PostLoadAction)$
+            $CustomAction(structure.PostLoadAction)$
+            $endif$
+
             $if(structure.IsAsset)$
             LoadAsset_$structure.Type.Name$($TypePtrVarName(structure.Type)$);
             $endif$