Set TransformHelperGen::is_row_sliced and is_col_sliced to const.

src/faust_linear_operator/faust_TransformHelperGen.h

@@ -103,8 +103,8 @@ namespace Faust
 			void get_item(faust_unsigned_int i, faust_unsigned_int j, MatDense<FPP, DEV>& out_mat, faust_unsigned_int &out_id);
 			bool is_row_fancy_indexed() {return is_fancy_indexed && fancy_indices[0] != nullptr;}
 			bool is_col_fancy_indexed() {return is_fancy_indexed && fancy_indices[1] != nullptr;}
-			bool is_row_sliced() {return is_sliced && (slices[0].start_id != 0 || slices[0].end_id != this->getNbRow());}
-			bool is_col_sliced() {return is_sliced && (slices[1].start_id != 0 || slices[1].end_id != this->getNbCol());}
+			bool is_row_sliced() const {return is_sliced && (slices[0].start_id != 0 || slices[0].end_id != this->getNbRow());}
+			bool is_col_sliced() const {return is_sliced && (slices[1].start_id != 0 || slices[1].end_id != this->getNbCol());}
 			virtual ~TransformHelperGen();
 
 		protected: