Drop stderr from mocp query

plugins/moc.py

@@ -2,6 +2,7 @@
 
 import sardine
 
+import os
 import subprocess
 
 
@@ -18,8 +19,10 @@ class TrackData(object):
         self.tt = ""    # total time
 
     def load(self):
+        FNULL = open(os.devnull, 'w+')
         for fieldname in self.__class__._field_names:
-            value = subprocess.check_output(['mocp', '-Q', "%" + fieldname])
+            value = subprocess.check_output(['mocp', '-Q', "%" + fieldname],
+                                            stderr=FNULL)
             setattr(self, fieldname, value.strip())