coverity 83659 plat unix check fstat return
coverity 83659 plat unix check fstat return

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

dumganhar/libwebsockets,tn0502/libwebsockets,wenqiwooo/syslog-libwebsockets,Chilledheart/libwebsockets,peeracle/libwebsockets,pombredanne/libwebsockets,pombredanne/libwebsockets,gameclosure/libwebsockets,wenqiwooo/syslog-libwebsockets,Chilledheart/libwebsockets,GroundControl-Solutions/libwebsockets,wenqiwooo/syslog-libwebsockets,wenqiwooo/syslog-libwebsockets,tn0502/libwebsockets,sartura/libwebsockets,PureSwift/libwebsockets,peeracle/libwebsockets,RobertoMalatesta/libwebsockets,PureSwift/libwebsockets,tn0502/libwebsockets,JoakimSoderberg/libwebsockets,PureSwift/libwebsockets,sartura/libwebsockets,mushroomgithub/libwebsockets,PureSwift/libwebsockets,sanyaade-teachings/libwebsockets,RobertoMalatesta/libwebsockets,jmillan/libwebsockets,SoapyMan/libwebsockets,mushroomgithub/libwebsockets,cambridgehackers/libwebsockets,pankona/libwebsockets,maws/libwebsockets,tn0502/libwebsockets,sanyaade-teachings/libwebsockets,JoakimSoderberg/libwebsockets,sanyaade-teachings/libwebsockets,PureSwift/libwebsockets,gameclosure/libwebsockets,dumganhar/libwebsockets,turbulenz/libwebsockets,SoapyMan/libwebsockets,pombredanne/libwebsockets,SoapyMan/libwebsockets,cambridgehackers/libwebsockets,peeracle/libwebsockets,peeracle/libwebsockets,sartura/libwebsockets,gameclosure/libwebsockets,cambridgehackers/libwebsockets,IOPOINT/libwebsockets,pombredanne/libwebsockets,sartura/libwebsockets,maws/libwebsockets,ralight/libwebsockets,Chilledheart/libwebsockets,maws/libwebsockets,pankona/libwebsockets,ralight/libwebsockets,gameclosure/libwebsockets,mushroomgithub/libwebsockets,SoapyMan/libwebsockets,dumganhar/libwebsockets,GroundControl-Solutions/libwebsockets,sanyaade-teachings/libwebsockets,ralight/libwebsockets,IOPOINT/libwebsockets,SoapyMan/libwebsockets,pankona/libwebsockets,GroundControl-Solutions/libwebsockets,jmillan/libwebsockets,sartura/libwebsockets,turbulenz/libwebsockets,peeracle/libwebsockets,maws/libwebsockets,mushroomgithub/libwebsockets,JoakimSoderberg/libwebsockets,cambridgehackers/libwebsockets,dumganhar/libwebsockets,GroundControl-Solutions/libwebsockets,jmillan/libwebsockets,RobertoMalatesta/libwebsockets,Chilledheart/libwebsockets,GroundControl-Solutions/libwebsockets,pankona/libwebsockets,turbulenz/libwebsockets,ralight/libwebsockets,sartura/libwebsockets,dumganhar/libwebsockets,RobertoMalatesta/libwebsockets,JoakimSoderberg/libwebsockets,ralight/libwebsockets,jmillan/libwebsockets,IOPOINT/libwebsockets,sartura/libwebsockets