Catch a missed place in function.py during Python 3 migration. Closes #1226.
Catch a missed place in function.py during Python 3 migration. Closes #1226.

iamahuman/angr,schieb/angr,angr/angr,angr/angr,schieb/angr,angr/angr,iamahuman/angr,schieb/angr,iamahuman/angr