[orange-add-on][noise reduction] hot fix if user ask for validation and hasn't...

[orange-add-on][noise reduction] hot fix if user ask for validation and hasn't try to update/apply noise reduction first

orangecontrib/id06workflow/widgets/noisereduction.py

@@ -96,7 +96,15 @@ class NoiseReductionOW(OWWidget):
     def validate(self):
         exp = self._widget._experiment
         if exp is not None:
-            self._widget.validate_correction()
+            try:
+                self._widget.validate_correction()
+            except ValueError:
+                # raw fix, in case update has not been activated yet
+                # TODO: should be managed by buttons availibility or know
+                # if there is some data in the cache
+                self._widget._updateCorrection()
+                self._widget.validate_correction()
+
             assert isinstance(exp, Experiment)
             _logger.info('Noise reduction validated')
             self.send("data", exp)