Switch to using check_call for hooks

beetsplug/hook.py

@@ -105,7 +105,7 @@ def hook_function(**kwargs):
                             u' '.join(command_pieces), event)
 
             try:
-                subprocess.Popen(command_pieces).wait()
+                subprocess.check_call(command_pieces)
             except OSError as exc:
                 self._log.error(u'hook for {0} failed: {1}', event, exc)