Optimize quoteIdentifier() a tiny bit.
Optimize quoteIdentifier() a tiny bit.

This removes one pointless preg_replace() call that isn't reached often
but is un-necessary from what I can see.

mvdriel/cakephp,davidyell/cakephp,dakota/cakephp,petteyg/cakephp,kumamidori/cakephp,CVO-Technologies/cakephp,dakota/cakephp,timhoeppner/cakephp,eryw/cakephp,CVO-Technologies/cakephp,justinyost/cakephp,garethellis36/cakephp,bravo-kernel/cakephp,yinhe007/cakephp,davidyell/cakephp,mvdriel/cakephp,CakeDC/cakephp,jjj117/cakephp,pbaire/cakephp,erikfig/cakephp,HavokInspiration/cakephp,eboominathan/cakephp,web-player/cakephp,eboominathan/cakephp,bravo-kernel/cakephp,ndm2/cakephp,berrygoudswaard/cakephp,cakephp-fr/cakephp,elboletaire/cakephp,mvdriel/cakephp,tenkoma/cakephp,petteyg/cakephp,web-player/cakephp,nrother/cakephp,thinkingmedia/cakephp,Phillaf/cakephp,adopico/cakephp,burriko/cakephp,jeffblack360/cakephp,petteyg/cakephp,nrother/cakephp,CakeDC/cakephp,khoimt/cakephp-study,berrygoudswaard/cakephp,dkarvounaris/cakephp,eryw/cakephp,khoimt/cakephp-study,garethellis36/cakephp,ndm2/cakephp,michaelze/cakephp,dkarvounaris/cakephp,gmponos/cakephp,cakephp-fr/cakephp,Phillaf/cakephp,eboominathan/cakephp,Balachan27/cakephp,timhoeppner/cakephp,kumamidori/cakephp,adopico/cakephp,burriko/cakephp,dakota/cakephp,Phillaf/cakephp,mvdriel/cakephp,cakephp/cakephp,eryw/cakephp,elboletaire/cakephp,akintoey/cakephp,HavokInspiration/cakephp,ndm2/cakephp,adopico/cakephp,michaelze/cakephp,Balachan27/cakephp,jeffblack360/cakephp,garethellis36/cakephp,petteyg/cakephp,ADmad/cakephp,michaelze/cakephp,erikfig/cakephp,ionas/cakephp,bravo-kernel/cakephp,tisu2tisu/cakephp,yinhe007/cakephp,gmponos/cakephp,HavokInspiration/cakephp,timhoeppner/cakephp,CakeDC/cakephp,tenkoma/cakephp,akintoey/cakephp,pbaire/cakephp,Balachan27/cakephp,ADmad/cakephp,ionas/cakephp,ionas/cakephp,justinyost/cakephp,dkarvounaris/cakephp,CVO-Technologies/cakephp,ADmad/cakephp,tenkoma/cakephp,yinhe007/cakephp,jerems02/cakephp,garethellis36/cakephp,jerems02/cakephp,kumamidori/cakephp,tgr0ss/cakephp,gmponos/cakephp,cakephp/cakephp,tgr0ss/cakephp,tisu2tisu/cakephp,tgr0ss/cakephp,elboletaire/cakephp,cakephp/cakephp,berrygoudswaard/cakephp,CakeDC/cakephp,jjj117/cakephp,thinkingmedia/cakephp,cakephp-fr/cakephp,dakota/cakephp,khoimt/cakephp-study,justinyost/cakephp,tenkoma/cakephp,ADmad/cakephp,pbaire/cakephp,nrother/cakephp,erikfig/cakephp,burriko/cakephp,jerems02/cakephp,jeffblack360/cakephp,web-player/cakephp,ndm2/cakephp,davidyell/cakephp,jjj117/cakephp,cakephp/cakephp,thinkingmedia/cakephp,tisu2tisu/cakephp,akintoey/cakephp