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
/* XPM */
static char *ScrollDn2_grey.xp_xpm[] = {
/* width height ncolors chars_per_pixel */
"16 15 10 1",
/* colors */
"a c #BBBBBB",
"b c #595959",
"c c #DCDCDC",
"d c #F0F0F0",
"e c #CECECE",
"f c #C0C0C0",
"g c #E1E1E1",
"h c #C9C9C9",
"i c #D3D3D3",
"j c none",
/* pixels */
"dddddddddddddddd",
"dgieeffffffffacd",
"dieeeefffffffffd",
"deeeeeeffffffffd",
"deeeeffffffffffd",
"dheefbfffffbfffd",
"dfefbbbfffbbbffd",
"dffffbbbfbbbfffd",
"dfffffbbbbbffffd",
"dffffffbbbfffffd",
"daffffffbffffffd",
"dafffffffffffffd",
"dafffffffffffffd",
"dcffffffffffffcd",
"dddddddddddddddd",
};