comctl32/listview: fix icon spacing calculation

[Nikolay Sivov]

On 1/14/2013 00:00, Daniel Jelinski wrote:
> -static DWORD LISTVIEW_SetIconSpacing(LISTVIEW_INFO *infoPtr, INT cx, INT cy)
> +static DWORD LISTVIEW_SetIconSpacing(LISTVIEW_INFO *infoPtr, WORD cx, WORD cy)
I don't really like it as WORD, what it really is a int value with 
special meaning reserved for -1.
For 64bits and lParam == -1 you'll still get two -1 values.

> +    /* LPARAM = -1 - restore default processing */
> +    ret = SendMessage(hwnd, LVM_SETICONSPACING, 0, MAKELPARAM(-1,-1));
> +todo_wine
> +    expect(100, LOWORD(ret));
> +    expect(0xFFFF, HIWORD(ret));
> +
> +    /* NOTE: -1 is not the same as MAKELPARAM(-1,-1) in 64bit listview */
> +    if(sizeof(LPARAM) == 8)
> +    {
> +        ret = SendMessage(hwnd, LVM_SETICONSPACING, 0, -1);
> +todo_wine {
> +        expect(0xFFFF, LOWORD(ret));
> +        expect(0xFFFF, HIWORD(ret));
> +        }
> +    }
That means you should just use lParam == -1. Also this message is 
supposed to use MAKELONG apparently, not sure if it makes a difference.