added check for nonexistent github session object
added check for nonexistent github session object

jiusanzhou/dillinger,benjamin-albert/dillinger,seripap/dillinger,salipro4ever/dillinger,johnko/dillinger,sorpaas/ahnote,mtvillwock/dillinger,un33k/dillinger,scalp42/dillinger,Stackato-Apps/dillinger,WhoRain/new,un33k/dillinger,jeremiahmarks/dillinger,dasJ/dillinger,baxrob/dillinger,pat-riley/dillinger,glaucomorais/dillinger,scalp42/dillinger,misterbisson/dillinger,TangHao1987/dillinger,joemccann/dillinger,benjamin-albert/dillinger,dasJ/dillinger,jesusmaldonado/dillinger,ojengwa/dillinger,Stackato-Apps/dillinger,jiusanzhou/dillinger,salipro4ever/dillinger,misterbisson/dillinger,CJstar/dillinger,jeremiahmarks/dillinger,baxrob/dillinger,saitodisse/dillinger,jesusmaldonado/dillinger,joemccann/dillinger,saitodisse/dillinger,jiusanzhou/dillinger,run-project/dillinger,glaucomorais/dillinger,hhgz9527/dillinger,ojengwa/dillinger,hhgz9527/dillinger,mtvillwock/dillinger,pat-riley/dillinger,TangHao1987/dillinger,run-project/dillinger,seripap/dillinger,johnko/dillinger,CJstar/dillinger,joemccann/dillinger,WhoRain/new