Updated gunicorn/pidfile.py
Updated gunicorn/pidfile.py

Added a try block to convert the contents of the `pidfile.py` if it can be converted to integer or not. If not, then `wpid` is assigned 0 and the `validate` function returns as usual. If the pidfile has a valid int, the function continues to kill the process as before.
ephes/gunicorn,gtrdotmcs/gunicorn,WSDC-NITWarangal/gunicorn,mvaled/gunicorn,elelianghh/gunicorn,malept/gunicorn,harrisonfeng/gunicorn,zhoucen/gunicorn,MrKiven/gunicorn,tempbottle/gunicorn,zhoucen/gunicorn,keakon/gunicorn,gtrdotmcs/gunicorn,GitHublong/gunicorn,zhoucen/gunicorn,gtrdotmcs/gunicorn,mvaled/gunicorn,z-fork/gunicorn,malept/gunicorn,tejasmanohar/gunicorn,mvaled/gunicorn,malept/gunicorn