fix string references bug
fix string references bug

tyb0807/angr,tyb0807/angr,chubbymaggie/angr,terry2012/angr,schieb/angr,mingderwang/angr,chubbymaggie/angr,angr/angr,fjferrer/angr,haylesr/angr,f-prettyland/angr,avain/angr,haylesr/angr,zhuyue1314/angr,terry2012/angr,iamahuman/angr,axt/angr,f-prettyland/angr,fjferrer/angr,xurantju/angr,zhuyue1314/angr,cureHsu/angr,angr/angr,lowks/angr,iamahuman/angr,f-prettyland/angr,xurantju/angr,tyb0807/angr,iamahuman/angr,lowks/angr,mingderwang/angr,schieb/angr,GuardianRG/angr,schieb/angr,axt/angr,angr/angr,chubbymaggie/angr,axt/angr,avain/angr,cureHsu/angr,GuardianRG/angr