Fix group by expression to work in strict mode.
Fix group by expression to work in strict mode.

dakota/cakephp,petteyg/cakephp,jeffblack360/cakephp,davidyell/cakephp,berrygoudswaard/cakephp,cakephp-fr/cakephp,justinyost/cakephp,ndm2/cakephp,CakeDC/cakephp,ADmad/cakephp,ndm2/cakephp,HavokInspiration/cakephp,ADmad/cakephp,tgr0ss/cakephp,mvdriel/cakephp,CVO-Technologies/cakephp,HavokInspiration/cakephp,Phillaf/cakephp,Phillaf/cakephp,ionas/cakephp,thinkingmedia/cakephp,cakephp/cakephp,ndm2/cakephp,ionas/cakephp,CVO-Technologies/cakephp,elboletaire/cakephp,cakephp/cakephp,tenkoma/cakephp,ADmad/cakephp,jeffblack360/cakephp,thinkingmedia/cakephp,CVO-Technologies/cakephp,petteyg/cakephp,justinyost/cakephp,ionas/cakephp,CakeDC/cakephp,elboletaire/cakephp,garethellis36/cakephp,Phillaf/cakephp,dakota/cakephp,ndm2/cakephp,mvdriel/cakephp,CakeDC/cakephp,davidyell/cakephp,berrygoudswaard/cakephp,HavokInspiration/cakephp,cakephp-fr/cakephp,nrother/cakephp,cakephp/cakephp,tenkoma/cakephp,petteyg/cakephp,dakota/cakephp,CakeDC/cakephp,tgr0ss/cakephp,berrygoudswaard/cakephp,mvdriel/cakephp,ADmad/cakephp,nrother/cakephp,garethellis36/cakephp,jeffblack360/cakephp,garethellis36/cakephp,davidyell/cakephp,tenkoma/cakephp,nrother/cakephp,justinyost/cakephp,dakota/cakephp,tenkoma/cakephp,tgr0ss/cakephp,cakephp-fr/cakephp,petteyg/cakephp,elboletaire/cakephp,thinkingmedia/cakephp,cakephp/cakephp,mvdriel/cakephp,garethellis36/cakephp