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 xm_warning_width 9
#define xm_warning_height 22
static char xm_warning_bits[] = {
0x00, 0x00, 0x18, 0x00, 0x2c, 0x00, 0x56, 0x00, 0x2a, 0x00, 0x56, 0x00,
0x2a, 0x00, 0x56, 0x00, 0x2c, 0x00, 0x14, 0x00, 0x2c, 0x00, 0x14, 0x00,
0x2c, 0x00, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3c, 0x00, 0x14, 0x00,
0x2c, 0x00, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00};