[processing] make additional Fusion parameters optional

alexbruy · alexbruy · commit bcf136bf8041 · 2017-01-25T15:45:14.000+02:00
(cherry picked from commit 49e7b94)
diff --git a/python/plugins/processing/algs/lidar/fusion/FusionAlgorithm.py b/python/plugins/processing/algs/lidar/fusion/FusionAlgorithm.py
@@ -48,7 +48,7 @@ def checkBeforeOpeningParametersDialog(self):
 
     def addAdvancedModifiers(self):
         param = ParameterString(
-            self.ADVANCED_MODIFIERS, self.tr('Additional modifiers'), '')
+            self.ADVANCED_MODIFIERS, self.tr('Additional modifiers'), '', optional=True)
         param.isAdvanced = True
         self.addParameter(param)
 
