fix v.surf.bspline modules, input must be a point layer

Author: gioman

python/plugins/processing/algs/grass/description/v.surf.bspline.lambda.txt

@@ -1,7 +1,7 @@
 v.surf.bspline
 v.surf.bspline.lambda - Bicubic or bilinear spline interpolation with Tykhonov regularization.
 Vector (v.*)
-ParameterVector|input|Input points layer|-1|False
+ParameterVector|input|Input points layer|0|False
 ParameterNumber|sie|Length of each spline step in the east-west direction|None|None|4
 ParameterNumber|sin|Length of each spline step in the north-south direction|None|None|4
 ParameterSelection|method|Spline interpolation algorithm|bilinear;bicubic

python/plugins/processing/algs/grass/description/v.surf.bspline.sparse.txt

@@ -1,7 +1,7 @@
 v.surf.bspline
 v.surf.bspline.sparse - Bicubic or bilinear spline interpolation with Tykhonov regularization.
 Vector (v.*)
-ParameterVector|input|Input points layer|-1|False
+ParameterVector|input|Input points layer|0|False
 ParameterVector|sparse|Input layer of sparse points|-1|False
 ParameterNumber|sie|Length of each spline step in the east-west direction|None|None|4
 ParameterNumber|sin|Length of each spline step in the north-south direction|None|None|4

python/plugins/processing/algs/grass/description/v.surf.bspline.txt

@@ -1,7 +1,7 @@
 v.surf.bspline
 v.surf.bspline - Bicubic or bilinear spline interpolation with Tykhonov regularization.
 Vector (v.*)
-ParameterVector|input|Input points layer|-1|False
+ParameterVector|input|Input points layer|0|False
 ParameterNumber|sie|Length of each spline step in the east-west direction|None|None|4
 ParameterNumber|sin|Length of each spline step in the north-south direction|None|None|4
 ParameterSelection|method|Spline interpolation algorithm|bilinear;bicubic