Use thread ID and not thread handle in the error messages in wxMSW.

The ID is in general more useful than the handle and this also fixes an assert
failure due to mismatch between the HANLDE type and "%x" format specifier.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@73585 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775