unicorn engine: don't use if single stepping (num_inst)
unicorn engine: don't use if single stepping (num_inst)

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