irc.client: Fix removing of participant on quit
irc.client: Fix removing of participant on quit

factor/factor,nicolas-p/factor,dch/factor,mrjbq7/factor,bjourne/factor,littledan/Factor,jwmerrill/factor,Keyholder/factor,sarvex/factor-lang,erg/factor,bpollack/factor,bjourne/factor,sarvex/factor-lang,mcandre/factor,AlexIljin/factor,bpollack/factor,littledan/Factor,erg/factor,mrjbq7/factor,kingcons/factor,tgunr/factor,mcandre/factor,cataska/factor,bpollack/factor,slavapestov/factor,bpollack/factor,factor/factor,bjourne/factor,mrjbq7/factor,factor/factor,bpollack/factor,dharmatech/factor,ceninan/factor,AlexIljin/factor,mcandre/factor,bpollack/factor,Keyholder/factor,factor/factor,nicolas-p/factor,AlexIljin/factor,jwmerrill/factor,sarvex/factor-lang,sarvex/factor-lang,slavapestov/factor,nicolas-p/factor,seckar/factor,kingcons/factor,dch/factor,nicolas-p/factor,erg/factor,mcandre/factor,bjourne/factor,dharmatech/factor,jwmerrill/factor,seckar/factor,factor/factor,mrjbq7/factor,mcandre/factor,cataska/factor,dch/factor,tgunr/factor,sarvex/factor-lang,mrjbq7/factor,erg/factor,AlexIljin/factor,kingcons/factor,slavapestov/factor,slavapestov/factor,nicolas-p/factor,erg/factor,mrjbq7/factor,kingcons/factor,bjourne/factor,Keyholder/factor,ehird/factor,ceninan/factor,mcandre/factor,dharmatech/factor,littledan/Factor,bpollack/factor,dch/factor,mcandre/factor,tgunr/factor,ceninan/factor,bjourne/factor,factor/factor,nicolas-p/factor,slavapestov/factor,slavapestov/factor,AlexIljin/factor,nicolas-p/factor,dch/factor,tgunr/factor,cataska/factor,ceninan/factor,dch/factor,tgunr/factor,ehird/factor,littledan/Factor,slavapestov/factor,tgunr/factor,AlexIljin/factor,erg/factor,bjourne/factor,sarvex/factor-lang,seckar/factor,AlexIljin/factor,cataska/factor,erg/factor,ehird/factor,sarvex/factor-lang