Start cleaning up Cocoa wxDataViewCtrl implementation: - Don't use "this->" which is not used anywhere else in wx code. - Use "()" instead of "(void)" as per wx coding standards. - Don't use end of function comments, this is inconsistent and unmaintainable. No real changes otherwise. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@62384 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775