Make last logged worker count an explicit instance var.
Make last logged worker count an explicit instance var.

keakon/gunicorn,GitHublong/gunicorn,tempbottle/gunicorn,elelianghh/gunicorn,ephes/gunicorn,tejasmanohar/gunicorn,WSDC-NITWarangal/gunicorn,MrKiven/gunicorn,z-fork/gunicorn,harrisonfeng/gunicorn