[processing] change 0 to Not set Null value also for contour

ghtmtt · nyalldawson · commit 57106986d6f7 · 2018-05-18T08:44:02.000+10:00
diff --git a/python/plugins/processing/algs/gdal/contour.py b/python/plugins/processing/algs/gdal/contour.py
@@ -91,7 +91,7 @@ def initAlgorithm(self, config=None):
         nodata_param = QgsProcessingParameterNumber(self.NODATA,
                                                     self.tr('Input pixel value to treat as "nodata"'),
                                                     type=QgsProcessingParameterNumber.Double,
-                                                    defaultValue=0.0,
+                                                    defaultValue='',
                                                     optional=True)
         nodata_param.setFlags(nodata_param.flags() | QgsProcessingParameterDefinition.FlagAdvanced)
         self.addParameter(nodata_param)
