Fixed wxLANGUAGE_USER_DEFINED, which is supposed to be the last element of
the enum, but as such must still be given, before messing with the automatic
internal counter of enum by defining synonyms. Fixes #16183.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76368 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775