[processing] fix parameter definition in offset curve algorithm

Author: alexbruy

python/plugins/processing/algs/gdal/offsetcurve.py

@@ -63,7 +63,7 @@ def defineCharacteristics(self):
                                           'geometry', optional=False))
         self.addParameter(ParameterNumber(self.RADIUS,
                                           self.tr('Offset distance (positive value for left-sided and negative - for right-sided)'),
-                                          0.0, 99999999.999999, 1000.0,
+                                          -99999999.999999, 99999999.999999, 1000.0,
                                           optional=False))
         self.addParameter(ParameterBoolean(self.DISSOLVEALL,
                                            self.tr('Dissolve all results'), False))

python/plugins/processing/tests/testdata/gdal_algorithm_tests.yaml

@@ -153,6 +153,9 @@ tests:
       OUTPUT_LAYER:
         name: expected/gdal/offset_lines.gml
         type: vector
+        compare:
+          geometry:
+            precision: 7
 
   - algorithm: gdalogr:singlesidedbufferforlines
     name: OGR one-side buffer for lines (left-handed)