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 ScrollRt_width 16
#define ScrollRt_height 16
static char ScrollRt_bits[] = {
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x00, 0x78, 0x00, 0xf8, 0x01,
0xf8, 0x07, 0xf8, 0x1f, 0xf8, 0x1f, 0xf8, 0x07, 0xf8, 0x01, 0x78, 0x00,
0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};