[DBAL-101] Fix bug when length is not defined in SQLite Schema manager.
[DBAL-101] Fix bug when length is not defined in SQLite Schema manager.

adrienbrault/dbal,deeky666/dbal,stchr/dbal,webonyx/dbal,DHager/dbal,janschoenherr/dbal,bspeterson/dbal,mathroc/dbal,shivergard/dbal,PureBilling/dbal,mbeccati/dbal,AlexDpy/dbal,Ocramius/dbal,drieschel/dbal,nfrignani/dbal,PowerKiKi/dbal,hason/dbal,v-bartusevicius/dbal,mikeSimonson/dbal,mihai-stancu/dbal,adrienbrault/dbal,mRoca/dbal,deeky666/dbal,mariuz/dbal,kupishkis/dbal,helicon-os/doctrine-dbal,DHager/dbal,vortgo/dbal,Tobion/dbal,v-bartusevicius/dbal,mariuz/dbal,drieschel/dbal,vutung2311/dbal,DataSyntax/dbal,webonyx/dbal,mbeccati/dbal,stof/dbal,hason/dbal,lcobucci/dbal,LionwareSolutions/dbal,stof/dbal,adrienbrault/dbal,kupishkis/dbal,webonyx/dbal,mihai-stancu/dbal,tk-s/dbal,PowerKiKi/dbal,nfrignani/dbal,sarcher/dbal,wuxu92/dbal,mihai-stancu/doctrine-dbal,LionwareSolutions/dbal,easybiblabs/dbal,wuxu92/dbal,Tobion/dbal,janschoenherr/dbal,stchr/dbal,mikeSimonson/dbal,kupishkis/dbal,zeroedin-bill/dbal,shivergard/dbal,zeroedin-bill/dbal,cassvail/dbal,doctrine/dbal,gencer/dbal,kimhemsoe/dbal,BenMorel/dbal,helicon-os/doctrine-dbal,lcobucci/dbal,PureBilling/dbal,cassvail/dbal,AlexDpy/dbal,tk-s/dbal,sarcher/dbal,kimhemsoe/dbal,mihai-stancu/doctrine-dbal,mRoca/dbal,lafourchette/dbal,LionwareSolutions/dbal,arima-ryunosuke/dbal,hason/dbal,bspeterson/dbal,vortgo/dbal,doctrine/dbal,arima-ryunosuke/dbal,easybiblabs/dbal,sarcher/dbal,mariuz/dbal,easybiblabs/dbal,DataSyntax/dbal,gencer/dbal,vutung2311/dbal,Ocramius/dbal,mathroc/dbal,PowerKiKi/dbal,lafourchette/dbal,BenMorel/dbal,arima-ryunosuke/dbal