using #ifdef wxABORT_ON_CONFIG_ERROR not just #if as elsewhere

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74656 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
using terminate: terminates prematurely, OnExit is not called anymore

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74657 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775