Extended log message in JackAlsaDriver::Read.

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@3514 0c269be4-1314-0410-8aa9-9f06e86f4224

linux/alsa/JackAlsaDriver.cpp

@@ -2277,7 +2277,7 @@ int JackAlsaDriver::Read()
         /* we detected an xrun and restarted: notify
          * clients about the delay. 
          */
-        jack_log("ALSA XRun");
+        jack_log("ALSA XRun wait_status = %d", wait_status);
         NotifyXRun(fBeginDateUst, fDelayedUsecs);
         return -1;
     }