Merge pull request #1981 from NaturalGIS/fix_saga_contour

fix SAGA contour lines from grid

Author: pcav

python/plugins/processing/algs/saga/description/2.1.3/ContourLinesfromGrid.txt

@@ -1,6 +1,6 @@
 Contour Lines from Grid
 shapes_grid
-ParameterRaster|INPUT|Grid|False
+ParameterRaster|GRID|Grid|False
 ParameterNumber|ZMIN|Minimum Contour Value|None|None|0.0
 ParameterNumber|ZMAX|Maximum Contour Value|None|None|10000.0
 ParameterNumber|ZSTEP|Equidistance|None|None|100.0