Fix PHP 5.3 compatibility issue
Fix PHP 5.3 compatibility issue

djpadz/kanboard,Busfreak/kanboard,lianguan/kanboard,Busfreak/kanboard,vaikan/kanboard,djpadz/kanboard,xavividal/kanboard,lianguan/kanboard,filhocf/kanboard,Shaxine/kanboard,kanboard/kanboard,vaikan/kanboard,fguillot/kanboard,thylo/kanboard,filhocf/kanboard,xavividal/kanboard,BlueTeck/kanboard,stinnux/kanboard,renothing/kanboard,vaikan/kanboard,stinnux/kanboard,fguillot/kanboard,BlueTeck/kanboard,cdgeelen/kanboard,lianguan/kanboard,renothing/kanboard,oliviermaridat/kanboard,patoi/kanboard,renothing/kanboard,libin/kanboard,cdgeelen/kanboard,djpadz/kanboard,Busfreak/kanboard,patoi/kanboard,Shaxine/kanboard,filhocf/kanboard,thylo/kanboard,fguillot/kanboard,thylo/kanboard,stinnux/kanboard,kanboard/kanboard,Nerdingher/kanboard,patoi/kanboard,Nerdingher/kanboard,oliviermaridat/kanboard,Nerdingher/kanboard,Shaxine/kanboard,libin/kanboard,xavividal/kanboard,cdgeelen/kanboard,oliviermaridat/kanboard,kanboard/kanboard,BlueTeck/kanboard