one more addition improvement in error_report
one more addition improvement in error_report

added check for `project_podfile` variable and only if it's not nil wi
will check `exist?`

ashfurrow/CocoaPods,orta/CocoaPods,Ashton-W/CocoaPods,mglidden/CocoaPods,0xced/CocoaPods,segiddins/CocoaPods,vivekshukla-mob-ibtech/Repository,mglidden/CocoaPods,mglidden/CocoaPods