[boost] [thread] TSS Cleanup on win64

Please could someone with access to the MSVC compilers on a 64-bit platform replace libs/thread/src/win32/tss_pe.cpp with the attached version and run the test_tss_lib test from the thread library. Currently this test is failing on MSVC 8/win64 due to lack of automatic cleanup of TSS data. Hopefully the attached version of tss_pe.cpp will fix that. Thanks, Anthony -- Anthony Williams Just Software Solutions Ltd - http://www.justsoftwaresolutions.co.uk Registered in England, Company Number 5478976. Registered Office: 15 Carrallack Mews, St Just, Cornwall, TR19 7UL