Division by zero on line 40

[Nino5000]

Hello,
after i updatet from PHP 4 to PHP5 I have got ann error Message (over the gallery items).

u can see it here: http://www.ninokann.de/index.php/fotos

Warning: Division by zero in ...
components/com_phocagallery/views/categories/tmpl/default.php on line 40


is there anybody who can helb me? ThanXs and greetings
Nino

ps
here is the line 40:
$begin[1] = ceil ($countCategories / $columns);

[Jan]

Hi, which version of Phoca Gallery you are running?