should not pass recv_writer_thread_handle to CloseHandle()

Calling CloseHandle on an invalid handle. See here:

UNIV_INTERN os_thread_t recv_writer_thread_handle = 0;

recv_init_crash_recovery() does:

recv_writer_thread_handle = os_thread_create(recv_writer_thread, 0, 0);

recv_recovery_from_checkpoint_finish() does:

if (recv_writer_thread_handle)

{ CloseHandle(recv_writer_thread_handle); }

However, os_thread_create() is not returning the HANDLE object from CreateThread, it is returning the lpThreadId!!!