fixed the VFG test case
fixed the VFG test case

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