[COMCTL32] Fix issue on showing mouse pointer on Mouse Prop Dlg

[zecarlos jesus]

static BOOL get_icon_size( HICON handle, SIZE *size )
{
    ICONINFO info;
    BITMAP bmp;
    int ret;

if (!GetIconInfo(handle, &info))
        return FALSE;

ret = GetObjectW(info.hbmMask, sizeof(bmp), &bmp);
    if (ret)
    {
        size->cx = bmp.bmWidth;
        size->cy = bmp.bmHeight;
        /*
            If this structure defines a black and white icon, this bitmask is formatted
            so that the upper half is the icon AND bitmask and the lower half is
            the icon XOR bitmask.
        */
        if (!info.hbmColor)
            size->cy /= 2;
    }

GetIconInfo() fill info.hbmColor with NULL HBITMAP handle on black/white bitmaps

DeleteObject(info.hbmMask);
    DeleteObject(info.hbmColor);

return !!ret;
}