Bugfix: may do unmap after MAP_FAILED
Bugfix: may do unmap after MAP_FAILED

nihaibao/phptrace,oikomi/phptrace,monque/phptrace,fengshao0907/phptrace,skyworker/phptrace,chenwenbin928/phptrace,nihaibao/phptrace,kmiku7/phptrace,fengshao0907/phptrace,chenwenbin928/phptrace,Qihoo360/phptrace,three2one/phptrace,skyworker/phptrace,monque/phptrace,outman/phptrace,tempbottle/phptrace,nihaibao/phptrace,silkCut/phptrace,oikomi/phptrace,skyworker/phptrace,outman/phptrace,xiaosl/phptrace,kmiku7/phptrace,xiaosl/phptrace,silkCut/phptrace,narlian/phptrace,chenwenbin928/phptrace,oikomi/phptrace,tempbottle/phptrace,outman/phptrace,kmiku7/phptrace,Qihoo360/phptrace,Qihoo360/phptrace,tempbottle/phptrace,xiaosl/phptrace,fengshao0907/phptrace,three2one/phptrace,chenwenbin928/phptrace,narlian/phptrace,xiaosl/phptrace,tempbottle/phptrace,nihaibao/phptrace,three2one/phptrace,narlian/phptrace,silkCut/phptrace,kmiku7/phptrace,oikomi/phptrace,skyworker/phptrace,outman/phptrace,fengshao0907/phptrace,narlian/phptrace,monque/phptrace,three2one/phptrace