Compiles again on Windows.

tests/test.cpp

@@ -163,7 +163,11 @@ void Collect(FrameTimeCollector* TheFrame)
 
 void Jack_Thread_Init_Callback(void *arg)
 {
+#ifdef WIN32
+    Log("Init callback has been successfully called from thread = %x. (msg from callback)\n", GetCurrentThread());
+#else
     Log("Init callback has been successfully called from thread = %x. (msg from callback)\n", pthread_self());
+#endif
     init_clbk = 1;
 }