Make fInit volatile in JackMessageBuffer class.

common/JackMessageBuffer.cpp

@@ -171,8 +171,11 @@ int JackMessageBuffer::SetInitCallback(JackThreadInitCallback callback, void *ar
         
         /*
         The condition variable emulation code does not work reliably on Windows (lost signal).
-        So use a "hachish" way to signal/wait for the result.
+        So use a "hackish" way to signal/wait for the result.
         Probaly better in the long term : use pthread-win32 (http://sourceware.org/pthreads-win32/)
+        // wake msg buffer thread 
+        fGuard.Signal()
+        // wait for it to be done  
         fGuard.Wait();
         */
 

common/JackMessageBuffer.h

@@ -57,7 +57,7 @@ class JackMessageBuffer : public JackRunnableInterface
 
     private:
 
-        JackThreadInitCallback fInit;
+        volatile JackThreadInitCallback fInit;
         void* fInitArg;
         JackMessage fBuffers[MB_BUFFERS];
         JackThread fThread;