use atof instead of atoi for input parameter

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@52184 15284696-431f-4ddb-bdfa-cd5b030d7da7

raster/r.resamp.filter/main.c

@@ -464,8 +464,8 @@ int main(int argc, char *argv[])
 	filter = &filters[num_filters++];
 	type = find_method(filter_arg);
 	filter->func = type->func;
-	filter->x_radius = fabs(atoi(x_radius_arg));
-	filter->y_radius = fabs(atoi(y_radius_arg));
+	filter->x_radius = fabs(atof(x_radius_arg));
+	filter->y_radius = fabs(atof(y_radius_arg));
 	if (type->radius) {
 	    double rx = type->radius * filter->x_radius;
 	    double ry = type->radius * filter->y_radius;