division by zero

[zmn28hgbn59kcmlpio8unfh7fdre523esd28q9a]

TravianZ/GameEngine/Building.php

Line 870 in 3e8a14b

$rctime = $rcrop / $village->getProd("crop") * 3600;

when going into available construction tiles to build a structure and crop production is exactly is 0, an error message is reported saying division by zero and a reference to this line.