fixing leak in the 'old' non-graphics code, thanks to Kevin

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@55129 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/mac/carbon/dccg.cpp

@@ -1066,6 +1066,9 @@ void wxMacCGContext::GetTextExtent( const wxString &str, wxCoord *width, wxCoord
         *width = FixedToInt(textAfter - textBefore) ;
 
     ::ATSUDisposeTextLayout(atsuLayout);
+#if SIZEOF_WCHAR_T == 4
+    free( ubuf ) ;
+#endif
 }
 
 void wxMacCGContext::GetPartialTextExtents(const wxString& text, wxArrayInt& widths) const
@@ -1123,6 +1126,9 @@ void wxMacCGContext::GetPartialTextExtents(const wxString& text, wxArrayInt& wid
     }
 
     ::ATSUDisposeTextLayout(atsuLayout);
+#if SIZEOF_WCHAR_T == 4
+    free( ubuf ) ;
+#endif
 }
 
 void wxMacCGContext::SetFont( const wxFont &font )