Fix for ticket #152.

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@3868 0c269be4-1314-0410-8aa9-9f06e86f4224

common/JackDriver.cpp

@@ -167,7 +167,7 @@ int JackDriver::Open(jack_nframes_t buffer_size,
 
 int JackDriver::Close()
 {
-    if (fClientControl.fRefNum > 0) { 
+    if (fClientControl.fRefNum >= 0) { 
         jack_log("JackDriver::Close");
         fGraphManager->DirectDisconnect(fClientControl.fRefNum, fClientControl.fRefNum); // Disconnect driver from itself for sync
         fClientControl.fActive = false;