refactor: StandartOperations

Author: IgorErin

src/GraphBLAS-sharp.Backend/Common/StandardOperations.fs

@@ -132,12 +132,12 @@ module StandardOperations =
 
     let maskOp<'a, 'b when 'a: struct and 'b: struct> =
         <@ fun (left: 'a option) (right: 'b option) ->
-            match left, right with
-            | _, Some _ -> left
+            match right with
+            | Some _ -> left
             | _ -> None @>
 
     let complementedMaskOp<'a, 'b when 'a: struct and 'b: struct> =
         <@ fun (left: 'a option) (right: 'b option) ->
-            match left, right with
-            | _, None -> left
+            match right with
+            | None -> left
             | _ -> None @>