Overloaded ctor taking wxArrayString didn't call Init() so the wxListBox fields were not initialized. Fix it by adding the Init() call. Closes #12138. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@64548 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775