fix mysterious segfault issue
fix mysterious segfault issue

schieb/angr,axt/angr,iamahuman/angr,iamahuman/angr,chubbymaggie/angr,angr/angr,chubbymaggie/simuvex,f-prettyland/angr,angr/angr,chubbymaggie/angr,axt/angr,tyb0807/angr,f-prettyland/angr,tyb0807/angr,tyb0807/angr,angr/simuvex,schieb/angr,angr/angr,f-prettyland/angr,iamahuman/angr,schieb/angr,axt/angr,chubbymaggie/simuvex,chubbymaggie/simuvex,chubbymaggie/angr