Fixed at-least-sometimes-wrong leave-behind-dead-map-nodes logic of perfmon_filter_t::subfilter.
Fixed at-least-sometimes-wrong leave-behind-dead-map-nodes logic of perfmon_filter_t::subfilter.

Some map values were getting set to NULL, but then those were not
getting deleted, thanks to a premature return statement.

robertjpayne/rethinkdb,dparnell/rethinkdb,yaolinz/rethinkdb,grandquista/rethinkdb,robertjpayne/rethinkdb,catroot/rethinkdb,alash3al/rethinkdb,robertjpayne/rethinkdb,greyhwndz/rethinkdb,bpradipt/rethinkdb,ajose01/rethinkdb,tempbottle/rethinkdb,niieani/rethinkdb,marshall007/rethinkdb,jmptrader/rethinkdb,robertjpayne/rethinkdb,AntouanK/rethinkdb,losywee/rethinkdb,dparnell/rethinkdb,wkennington/rethinkdb,ajose01/rethinkdb,Qinusty/rethinkdb,jesseditson/rethinkdb,dparnell/rethinkdb,jmptrader/rethinkdb,ayumilong/rethinkdb,victorbriz/rethinkdb,AntouanK/rethinkdb,wujf/rethinkdb,bpradipt/rethinkdb,4talesa/rethinkdb,wujf/rethinkdb,scripni/rethinkdb,matthaywardwebdesign/rethinkdb,4talesa/rethinkdb,jesseditson/rethinkdb,bchavez/rethinkdb,matthaywardwebdesign/rethinkdb,alash3al/rethinkdb,alash3al/rethinkdb,gavioto/rethinkdb,RubenKelevra/rethinkdb,pap/rethinkdb,JackieXie168/rethinkdb,wkennington/rethinkdb,yakovenkodenis/rethinkdb,captainpete/rethinkdb,sebadiaz/rethinkdb,spblightadv/rethinkdb,victorbriz/rethinkdb,scripni/rethinkdb,catroot/rethinkdb,grandquista/rethinkdb,pap/rethinkdb,mcanthony/rethinkdb,greyhwndz/rethinkdb,urandu/rethinkdb,victorbriz/rethinkdb,mbroadst/rethinkdb,sebadiaz/rethinkdb,RubenKelevra/rethinkdb,gdi2290/rethinkdb,elkingtonmcb/rethinkdb,JackieXie168/rethinkdb,wujf/rethinkdb,scripni/rethinkdb,sbusso/rethinkdb,yakovenkodenis/rethinkdb,yaolinz/rethinkdb,elkingtonmcb/rethinkdb,jesseditson/rethinkdb,robertjpayne/rethinkdb,victorbriz/rethinkdb,ayumilong/rethinkdb,lenstr/rethinkdb,mquandalle/rethinkdb,KSanthanam/rethinkdb,Qinusty/rethinkdb,Wilbeibi/rethinkdb,eliangidoni/rethinkdb,sebadiaz/rethinkdb,bchavez/rethinkdb,rrampage/rethinkdb,dparnell/rethinkdb,AntouanK/rethinkdb,rrampage/rethinkdb,gdi2290/rethinkdb,sebadiaz/rethinkdb,robertjpayne/rethinkdb,matthaywardwebdesign/rethinkdb,elkingtonmcb/rethinkdb,scripni/rethinkdb,AntouanK/rethinkdb,sebadiaz/rethinkdb,jmptrader/rethinkdb,mquandalle/rethinkdb,alash3al/rethinkdb,Qinusty/rethinkdb,eliangidoni/rethinkdb,marshall007/rethinkdb,yaolinz/rethinkdb,bchavez/rethinkdb,mquandalle/rethinkdb,pap/rethinkdb,KSanthanam/rethinkdb,marshall007/rethinkdb,eliangidoni/rethinkdb,sebadiaz/rethinkdb,eliangidoni/rethinkdb,dparnell/rethinkdb,victorbriz/rethinkdb,jmptrader/rethinkdb,losywee/rethinkdb,ayumilong/rethinkdb,bpradipt/rethinkdb,pap/rethinkdb,sontek/rethinkdb,sebadiaz/rethinkdb,mquandalle/rethinkdb,mcanthony/rethinkdb,pap/rethinkdb,spblightadv/rethinkdb,4talesa/rethinkdb,bpradipt/rethinkdb,greyhwndz/rethinkdb,grandquista/rethinkdb,AntouanK/rethinkdb,gdi2290/rethinkdb,wojons/rethinkdb,marshall007/rethinkdb,yaolinz/rethinkdb,sbusso/rethinkdb,sbusso/rethinkdb,pap/rethinkdb,JackieXie168/rethinkdb,spblightadv/rethinkdb,gdi2290/rethinkdb,mbroadst/rethinkdb,gavioto/rethinkdb,grandquista/rethinkdb,Wilbeibi/rethinkdb,urandu/rethinkdb,elkingtonmcb/rethinkdb,losywee/rethinkdb,yaolinz/rethinkdb,jesseditson/rethinkdb,marshall007/rethinkdb,sontek/rethinkdb,matthaywardwebdesign/rethinkdb,matthaywardwebdesign/rethinkdb,ayumilong/rethinkdb,robertjpayne/rethinkdb,elkingtonmcb/rethinkdb,losywee/rethinkdb,jmptrader/rethinkdb,captainpete/rethinkdb,lenstr/rethinkdb,spblightadv/rethinkdb,4talesa/rethinkdb,captainpete/rethinkdb,marshall007/rethinkdb,losywee/rethinkdb,yakovenkodenis/rethinkdb,urandu/rethinkdb,yaolinz/rethinkdb,captainpete/rethinkdb,jmptrader/rethinkdb,tempbottle/rethinkdb,JackieXie168/rethinkdb,spblightadv/rethinkdb,gavioto/rethinkdb,mcanthony/rethinkdb,Wilbeibi/rethinkdb,bpradipt/rethinkdb,rrampage/rethinkdb,catroot/rethinkdb,bchavez/rethinkdb,wojons/rethinkdb,catroot/rethinkdb,mquandalle/rethinkdb,scripni/rethinkdb,pap/rethinkdb,RubenKelevra/rethinkdb,JackieXie168/rethinkdb,lenstr/rethinkdb,mcanthony/rethinkdb,wujf/rethinkdb,urandu/rethinkdb,bchavez/rethinkdb,gavioto/rethinkdb,mquandalle/rethinkdb,rrampage/rethinkdb,urandu/rethinkdb,alash3al/rethinkdb,RubenKelevra/rethinkdb,sbusso/rethinkdb,catroot/rethinkdb,urandu/rethinkdb,Wilbeibi/rethinkdb,alash3al/rethinkdb,niieani/rethinkdb,wkennington/rethinkdb,sbusso/rethinkdb,gdi2290/rethinkdb,lenstr/rethinkdb,losywee/rethinkdb,RubenKelevra/rethinkdb,catroot/rethinkdb,yaolinz/rethinkdb,victorbriz/rethinkdb,Qinusty/rethinkdb,elkingtonmcb/rethinkdb,sbusso/rethinkdb,Wilbeibi/rethinkdb,tempbottle/rethinkdb,wujf/rethinkdb,ayumilong/rethinkdb,wkennington/rethinkdb,4talesa/rethinkdb,greyhwndz/rethinkdb,sontek/rethinkdb,wojons/rethinkdb,lenstr/rethinkdb,KSanthanam/rethinkdb,KSanthanam/rethinkdb,captainpete/rethinkdb,dparnell/rethinkdb,sontek/rethinkdb,ajose01/rethinkdb,wujf/rethinkdb,scripni/rethinkdb,sontek/rethinkdb,tempbottle/rethinkdb,4talesa/rethinkdb,ayumilong/rethinkdb,tempbottle/rethinkdb,greyhwndz/rethinkdb,Wilbeibi/rethinkdb,gavioto/rethinkdb,matthaywardwebdesign/rethinkdb,wojons/rethinkdb,ajose01/rethinkdb,niieani/rethinkdb,pap/rethinkdb,rrampage/rethinkdb,tempbottle/rethinkdb,gdi2290/rethinkdb,rrampage/rethinkdb,dparnell/rethinkdb,matthaywardwebdesign/rethinkdb,mbroadst/rethinkdb,eliangidoni/rethinkdb,jesseditson/rethinkdb,jesseditson/rethinkdb,mbroadst/rethinkdb,spblightadv/rethinkdb,wojons/rethinkdb,4talesa/rethinkdb,elkingtonmcb/rethinkdb,lenstr/rethinkdb,dparnell/rethinkdb,mcanthony/rethinkdb,ayumilong/rethinkdb,sontek/rethinkdb,gavioto/rethinkdb,ajose01/rethinkdb,tempbottle/rethinkdb,jmptrader/rethinkdb,urandu/rethinkdb,RubenKelevra/rethinkdb,robertjpayne/rethinkdb,lenstr/rethinkdb,wkennington/rethinkdb,Wilbeibi/rethinkdb,grandquista/rethinkdb,mbroadst/rethinkdb,mcanthony/rethinkdb,grandquista/rethinkdb,yakovenkodenis/rethinkdb,niieani/rethinkdb,sbusso/rethinkdb,bpradipt/rethinkdb,mquandalle/rethinkdb,yaolinz/rethinkdb,KSanthanam/rethinkdb,jmptrader/rethinkdb,gavioto/rethinkdb,mbroadst/rethinkdb,niieani/rethinkdb,JackieXie168/rethinkdb,grandquista/rethinkdb,wujf/rethinkdb,KSanthanam/rethinkdb,mquandalle/rethinkdb,AntouanK/rethinkdb,mcanthony/rethinkdb,alash3al/rethinkdb,Qinusty/rethinkdb,grandquista/rethinkdb,losywee/rethinkdb,losywee/rethinkdb,wojons/rethinkdb,sbusso/rethinkdb,bchavez/rethinkdb,wojons/rethinkdb,gdi2290/rethinkdb,gavioto/rethinkdb,bchavez/rethinkdb,bchavez/rethinkdb,matthaywardwebdesign/rethinkdb,marshall007/rethinkdb,catroot/rethinkdb,wojons/rethinkdb,grandquista/rethinkdb,robertjpayne/rethinkdb,ajose01/rethinkdb,yakovenkodenis/rethinkdb,spblightadv/rethinkdb,rrampage/rethinkdb,captainpete/rethinkdb,AntouanK/rethinkdb,scripni/rethinkdb,mbroadst/rethinkdb,bpradipt/rethinkdb,bchavez/rethinkdb,eliangidoni/rethinkdb,eliangidoni/rethinkdb,4talesa/rethinkdb,mbroadst/rethinkdb,dparnell/rethinkdb,Wilbeibi/rethinkdb,greyhwndz/rethinkdb,rrampage/rethinkdb,spblightadv/rethinkdb,wkennington/rethinkdb,JackieXie168/rethinkdb,Qinusty/rethinkdb,niieani/rethinkdb,yakovenkodenis/rethinkdb,victorbriz/rethinkdb,KSanthanam/rethinkdb,jesseditson/rethinkdb,RubenKelevra/rethinkdb,sontek/rethinkdb,victorbriz/rethinkdb,captainpete/rethinkdb,bpradipt/rethinkdb,yakovenkodenis/rethinkdb,ajose01/rethinkdb,AntouanK/rethinkdb,niieani/rethinkdb,sontek/rethinkdb,alash3al/rethinkdb,bpradipt/rethinkdb,captainpete/rethinkdb,jesseditson/rethinkdb,niieani/rethinkdb,Qinusty/rethinkdb,Qinusty/rethinkdb,eliangidoni/rethinkdb,tempbottle/rethinkdb,yakovenkodenis/rethinkdb,JackieXie168/rethinkdb,eliangidoni/rethinkdb,urandu/rethinkdb,greyhwndz/rethinkdb,sebadiaz/rethinkdb,KSanthanam/rethinkdb,RubenKelevra/rethinkdb,scripni/rethinkdb,wkennington/rethinkdb,wkennington/rethinkdb,ajose01/rethinkdb,ayumilong/rethinkdb,greyhwndz/rethinkdb,mbroadst/rethinkdb,Qinusty/rethinkdb,elkingtonmcb/rethinkdb,mcanthony/rethinkdb,JackieXie168/rethinkdb,lenstr/rethinkdb,marshall007/rethinkdb,catroot/rethinkdb