Add return statement.
Add return statement.


Former-commit-id: 937d76ae2b7799fcc073a52fe28baed1c9878e7a
djosborne/libcalico,insequent/libcalico,TrimBiggs/libcalico,projectcalico/libcalico,tomdee/libcalico,robbrockbank/libcalico,tomdee/libnetwork-plugin,projectcalico/libnetwork-plugin,TrimBiggs/libnetwork-plugin,caseydavenport/libcalico,Symmetric/libcalico,alexhersh/libcalico,L-MA/libcalico,TrimBiggs/libnetwork-plugin,plwhite/libcalico