libwinpr: attempt to fix TerminateThread(...).

The following sequence should not hang forever anymore: TerminateThread(thread, 0); WaitForSingleObject(thread, INFINTE);

winpr/libwinpr/thread/thread.c

@@ -580,6 +580,7 @@ BOOL TerminateThread(HANDLE hThread, DWORD dwExitCode)
 	WLog_ERR(TAG, "Function not supported on this platform!");
 #endif
 	pthread_mutex_unlock(&thread->mutex);
+        set_event(thread);
 	return TRUE;
 }