fix lock clean up code when there is a bug. This could help following tests to…

theano/gof/compilelock.py

@@ -320,7 +320,7 @@ def refresh_lock(lock_file):
         # from failing, we release the lock, but as there is a
         # problem, we still keep the original exception.
         # This way, only 1 test would fail.
-        while get_lock.lock_is_enabled:
+        while get_lock.n_lock > 0:
             release_lock()
         _logger.warn('Refreshing lock failed, we release the'
                      ' lock before raising again the exception')