+ Win64 SEH: install a top-level exception handler around thread functions. This was a missing puzzle piece of SEH support. Now behavior of unhandled exceptions in non-main threads is consistent with that of main thread, and, in general, behavior of SEH-enabled RTL is consistent with one without SEH.


git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@23482 3ad0048d-3df7-0310-abae-a5850022a9f2