[orangecontrib] add progressbar initialization

orangecontrib/xas/process.py

@@ -50,6 +50,7 @@ class _PyMcaProcessForOrangeMixIn(object):
 
     def _startProcess(self):
         self._window.setEnabled(False)
+        self._progress.widget.progressBarInit()
 
     def _endProcess(self, xas_obj):
         self._window.setEnabled(True)