[bug] completion makes input jump up one line

[Mikael Magnusson <mangosoft@xxxxxxxxx>]

under 4.1, if i tabcomplete, and one of the matches in the list is a 
multiple of $COLUMNS, ie, if the last letter of the match is in the 
rightmost column, the whole thing jumps up one line. i confirmed it with 
caphuso on #zsh, it happens in 4.1, but not 4.0
here is a "screenshot":
_______________________________________________________________________
|{1:53:24:~/dl/oc}6% rm Destiny <cursor ends up here>                 |
|{1:53:24:~/dl/oc}6% rm Destiny                                       |
|Destiny\ -\ Star\ Ocean\ 2\ The\ Second\ Story\ -\ Frozen\ Dreams.mp3|
|Destiny,\ OverCoat\ -\ Seiken\ Densetsu\ 3\ -\ Angels\ Dear\ \(Vocal\|
|).mp3                                                                |
|Destiny,\ zyko\ -\ Chrono\ Cross\ -\ Dragon\'s\ Prayer\ The\ Blackene|
|d\ Desire.mp3                                                        |
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--
Mikael Magnusson

Ps, cc replies to me as i'm not on the list