Issue #124, case 1: Added test for this case
Actual fix is in stx:libbasic, revision 3563e89f551b.
https://swing.fit.cvut.cz/projects/stx-jv/ticket/124#comment:19
#define ScrollLt_win_width 16
#define ScrollLt_win_height 16
static char ScrollLt_win_bits[] = {
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0x00, 0xc0, 0x00, 0xe0, 0x00,
0xf0, 0x1f, 0xf8, 0x1f, 0xf8, 0x1f, 0xf0, 0x1f, 0xe0, 0x00, 0xc0, 0x00,
0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};