PR libgcj/14751
* win32-threads.cc (_Jv_ThreadInitData): Zero out thread
handle in newly-allocated _Jv_Thread_t.
(_Jv_ThreadDestroyData): Close thread handle.
(_Jv_ThreadStart): Remove obsolete comment.
Store handle of newly-created thread in _Jv_Thread_t.
* include/win32-threads.h: #define WIN32_LEAN_AND_MEAN
before including <windows.h>
#define _Jv_HaveCondDestroy
From-SVN: r87362