adding API note

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@60014 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/osx/carbon/dcscreen.cpp

@@ -61,6 +61,8 @@ wxScreenDCImpl::~wxScreenDCImpl()
 #endif
 }
 
+// TODO Switch to CGWindowListCreateImage for 10.5 and above
+
 wxBitmap wxScreenDCImpl::DoGetAsBitmap(const wxRect *subrect) const
 {
     CGRect srcRect = CGRectMake(0, 0, m_width, m_height);