order than the current OnInit handling for cocoa and carbon we still have to use the native callback for ios

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76522 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
fixing compile in case of absent wxSpinCtrl

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76523 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775