Add missing index initialization in one of wxEnumProperty ctor.

In every wxEnumProperty ctor, initial index value of selected choice must be set to zero.

See #16401.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76993 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
fix GUI test compile error on platforms where long is shorted than wxIntPtr (i.e. x64 Windows)

Signed-off-by: Marian 'VooDooMan' Meravy <vdm113@gmail.com>
fix compile error in GUI unit test where long is shorter than wxIntPtr (i.e. x64 Windows)

Signed-off-by: unknown <vdmn@vdmn.lan>
Merge branch 'master' of ../wxWidgets_vanilla_trunk-svn into merge
sync with upstream (SVN); patched for ICC; removed files we do not support

Signed-off-by: Marian 'VooDooMan' Meravy <vdm113@gmail.com>
restore our README.md for Github

Signed-off-by: Marian 'VooDooMan' Meravy <vdm113@gmail.com>