fix accept nonzero as close from WRITEABLE callback
fix accept nonzero as close from WRITEABLE callback

Signed-off-by: Andy Green <b471f5a494de34531c9e5a6e15abda71edd49104@linaro.org>

peeracle/libwebsockets,sartura/libwebsockets,wenqiwooo/syslog-libwebsockets,GroundControl-Solutions/libwebsockets,abligh/libwebsockets,cambridgehackers/libwebsockets,PureSwift/libwebsockets,abligh/libwebsockets,wenqiwooo/syslog-libwebsockets,turbulenz/libwebsockets,SoapyMan/libwebsockets,maws/libwebsockets,maws/libwebsockets,gameclosure/libwebsockets,ralight/libwebsockets,PureSwift/libwebsockets,pankona/libwebsockets,abligh/libwebsockets,SoapyMan/libwebsockets,ralight/libwebsockets,antmicro/libwebsockets,DaYeSquad/libwebsockets,dumganhar/libwebsockets,antmicro/libwebsockets,jmillan/libwebsockets,pombredanne/libwebsockets,pankona/libwebsockets,RobertoMalatesta/libwebsockets,jmillan/libwebsockets,IOPOINT/libwebsockets,DaYeSquad/libwebsockets,Chilledheart/libwebsockets,GroundControl-Solutions/libwebsockets,GroundControl-Solutions/libwebsockets,Chilledheart/libwebsockets,canopy-project/libwebsockets-canopy,GroundControl-Solutions/libwebsockets,ralight/libwebsockets,cambridgehackers/libwebsockets,sartura/libwebsockets,sanyaade-teachings/libwebsockets,Chilledheart/libwebsockets,maws/libwebsockets,cambridgehackers/libwebsockets,peeracle/libwebsockets,mushroomgithub/libwebsockets,ralight/libwebsockets,sanyaade-teachings/libwebsockets,dumganhar/libwebsockets,lukasz-skalski/libwebsockets,DaYeSquad/libwebsockets,lukasz-skalski/libwebsockets,mushroomgithub/libwebsockets,tn0502/libwebsockets,Chilledheart/libwebsockets,peeracle/libwebsockets,jmillan/libwebsockets,pombredanne/libwebsockets,canopy-project/libwebsockets-canopy,peeracle/libwebsockets,mushroomgithub/libwebsockets,maws/libwebsockets,antmicro/libwebsockets,jmillan/libwebsockets,SoapyMan/libwebsockets,GroundControl-Solutions/libwebsockets,PureSwift/libwebsockets,gameclosure/libwebsockets,dumganhar/libwebsockets,sanyaade-teachings/libwebsockets,RobertoMalatesta/libwebsockets,pombredanne/libwebsockets,SoapyMan/libwebsockets,giovanni-liboni/libwebsockets,lukasz-skalski/libwebsockets,IOPOINT/libwebsockets,IOPOINT/libwebsockets,sartura/libwebsockets,wenqiwooo/syslog-libwebsockets,DaYeSquad/libwebsockets,pombredanne/libwebsockets,mushroomgithub/libwebsockets,wenqiwooo/syslog-libwebsockets,sartura/libwebsockets,RobertoMalatesta/libwebsockets,gameclosure/libwebsockets,JoakimSoderberg/libwebsockets,ralight/libwebsockets,RobertoMalatesta/libwebsockets,peeracle/libwebsockets,abligh/libwebsockets,turbulenz/libwebsockets,tn0502/libwebsockets,sartura/libwebsockets,sartura/libwebsockets,DaYeSquad/libwebsockets,SoapyMan/libwebsockets,giovanni-liboni/libwebsockets,sartura/libwebsockets,sanyaade-teachings/libwebsockets,canopy-project/libwebsockets-canopy,JoakimSoderberg/libwebsockets,dumganhar/libwebsockets,PureSwift/libwebsockets,JoakimSoderberg/libwebsockets,pankona/libwebsockets,pankona/libwebsockets,turbulenz/libwebsockets,JoakimSoderberg/libwebsockets,cambridgehackers/libwebsockets,tn0502/libwebsockets,dumganhar/libwebsockets,gameclosure/libwebsockets,lukasz-skalski/libwebsockets,antmicro/libwebsockets,giovanni-liboni/libwebsockets,tn0502/libwebsockets,giovanni-liboni/libwebsockets,PureSwift/libwebsockets