Add support for list element set

tpl/bhl_bind_macro.twig

@@ -582,6 +582,31 @@ Script_{{o.name|norm_name}}.Method_{{m.name}}.ReturnValue(frm, stack
       );
       cl.Define(fn);
     }
+    {
+        var fn = new FuncSymbolNative(new Origin(), "Set", Types.Void,
+        delegate(VM.Frame frm, ValStack stack, FuncArgsInfo args_info, ref BHS status)
+        {
+#if !BHL_FRONT
+        var index = stack.Pop();
+        var val = stack.Pop();
+        var val_lst = stack.Pop();
+
+        {#TODO: get rid of replace hack below#}
+        {{('var ' ~ _self.val2native(token(o, 'bhl_native_arr_proxy'), 'val', 'tmp'))|replace({'tmp = tmp' : '', 'var var' : 'var'})}};
+        var lst = ((List<{{token(o, 'bhl_native_arr_proxy')|native_type}}>)val_lst.obj);
+        lst[(int)index._num] = tmp;
+
+        val.Release();
+        index.Release();
+        val_lst.Release();
+#endif
+          return null;
+        },
+        new FuncArgSymbol("v", {{token(o, 'bhl_native_arr_proxy')|bhl_type_ref}}),
+        new FuncArgSymbol("idx", Types.Int)
+      );
+      cl.Define(fn);
+    }
     cl.Setup();
     {{scope}}.Define(cl);
   }