[processing] Fix another exception in modeler

Author: nyalldawson

python/plugins/processing/modeler/ModelerParametersDialog.py

@@ -324,7 +324,11 @@ def createAlgorithm(self):
             if param.isDestination() or param.flags() & QgsProcessingParameterDefinition.FlagHidden:
                 continue
             try:
-                val = self.wrappers[param.name()].parameterValue()
+                wrapper = self.wrappers[param.name()]
+                if issubclass(wrapper.__class__, QgsProcessingModelerParameterWidget):
+                    val = wrapper.value()
+                else:
+                    val = wrapper.parameterValue()
             except InvalidParameterValue:
                 self.bar.pushMessage(self.tr("Error"),
                                      self.tr("Wrong or missing value for parameter '{}'").format(param.description()),