riched20: implement EM_SCROLL and its tests

[Alexandre Julliard]

adlr at ucla.edu writes:

> @@ -2055,6 +2054,51 @@
>      }
>      return 0;
>    }
> +  case EM_SCROLL: /* partially copied from WM_VSCROLL */

You should be using the same code for both instead of duplicating it.

-- 
Alexandre Julliard
julliard at winehq.org