Fix issues with stack trace output.
Fix issues with stack trace output.

Traces without files and without classes caused errors in printing
the fancy trace.

tgr0ss/cakephp,yinhe007/cakephp,justinyost/cakephp,yinhe007/cakephp,timhoeppner/cakephp,jeffblack360/cakephp,mvdriel/cakephp,Balachan27/cakephp,cakephp/cakephp,CakeDC/cakephp,jerems02/cakephp,tgr0ss/cakephp,eboominathan/cakephp,HavokInspiration/cakephp,jjj117/cakephp,nrother/cakephp,jeffblack360/cakephp,tenkoma/cakephp,Phillaf/cakephp,thinkingmedia/cakephp,jerems02/cakephp,garethellis36/cakephp,thinkingmedia/cakephp,elboletaire/cakephp,gmponos/cakephp,Phillaf/cakephp,cakephp/cakephp,tenkoma/cakephp,dakota/cakephp,dakota/cakephp,CakeDC/cakephp,jjj117/cakephp,web-player/cakephp,ADmad/cakephp,thinkingmedia/cakephp,eboominathan/cakephp,davidyell/cakephp,eryw/cakephp,timhoeppner/cakephp,ionas/cakephp,et304383/passbolt_api,cakephp-fr/cakephp,michaelze/cakephp,akintoey/cakephp,ionas/cakephp,eryw/cakephp,pbaire/cakephp,jeffblack360/cakephp,garethellis36/cakephp,yinhe007/cakephp,et304383/passbolt_api,khoimt/cakephp-study,ionas/cakephp,khoimt/cakephp-study,CVO-Technologies/cakephp,michaelze/cakephp,HavokInspiration/cakephp,jjj117/cakephp,garethellis36/cakephp,ADmad/cakephp,eryw/cakephp,akintoey/cakephp,dkarvounaris/cakephp,davidyell/cakephp,akintoey/cakephp,mvdriel/cakephp,petteyg/cakephp,ADmad/cakephp,tenkoma/cakephp,mvdriel/cakephp,gmponos/cakephp,petteyg/cakephp,ndm2/cakephp,CakeDC/cakephp,pbaire/cakephp,cakephp-fr/cakephp,garethellis36/cakephp,cakephp-fr/cakephp,CVO-Technologies/cakephp,mvdriel/cakephp,berrygoudswaard/cakephp,berrygoudswaard/cakephp,khoimt/cakephp-study,erikfig/cakephp,et304383/passbolt_api,ndm2/cakephp,adopico/cakephp,cakephp/cakephp,bravo-kernel/cakephp,nrother/cakephp,et304383/passbolt_api,bravo-kernel/cakephp,eboominathan/cakephp,kumamidori/cakephp,tenkoma/cakephp,Balachan27/cakephp,ndm2/cakephp,bravo-kernel/cakephp,dakota/cakephp,tgr0ss/cakephp,justinyost/cakephp,petteyg/cakephp,et304383/passbolt_api,tisu2tisu/cakephp,davidyell/cakephp,nrother/cakephp,CakeDC/cakephp,timhoeppner/cakephp,burriko/cakephp,kumamidori/cakephp,dkarvounaris/cakephp,petteyg/cakephp,pbaire/cakephp,HavokInspiration/cakephp,michaelze/cakephp,Phillaf/cakephp,dakota/cakephp,kumamidori/cakephp,jerems02/cakephp,elboletaire/cakephp,burriko/cakephp,erikfig/cakephp,web-player/cakephp,berrygoudswaard/cakephp,web-player/cakephp,ndm2/cakephp,Balachan27/cakephp,elboletaire/cakephp,justinyost/cakephp,adopico/cakephp,tisu2tisu/cakephp,tisu2tisu/cakephp,adopico/cakephp,CVO-Technologies/cakephp,gmponos/cakephp,erikfig/cakephp,dkarvounaris/cakephp,cakephp/cakephp,burriko/cakephp,ADmad/cakephp