added calls for invalidating the dc setup on mac explicitely (needed in case of nested updates (e.g. writing a message to a text control while being in paint mode)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@9438 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/mac/carbon/aga.cpp

@@ -2619,6 +2619,7 @@ AGAPortHelper::~AGAPortHelper()
 		TextMode( mode );
 		SetOrigin( 0 , 0 ) ;
 		SetPort( port ) ;
+		wxDC::MacInvalidateSetup() ;
 	}
 }