split: No error when writing to /dev/full

[oech3]

$ ln -sf /dev/full xaa
$ seq 2 | uu-split -b 1 # no err
$ file xab
xab: very short file (no magic) # GNU does not put the gabadge in the case
$ seq 2 | gnu-split -b 1
split: xaa: No space left on device

See also #9832