Return true from GetRangeSize or partial extents will be incorrectly filled in

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_3_0_BRANCH@75843 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/richtext/richtextbuffer.cpp

@@ -12215,7 +12215,7 @@ bool wxRichTextImage::GetRangeSize(const wxRichTextRange& range, wxSize& size, i
         size.x = 0; size.y = 0;
         if (partialExtents)
             partialExtents->Add(0);
-        return false;
+        return true;
     }
 
     wxRichTextAttr attr(GetAttributes());