added missing `return` statement
added missing `return` statement

Signed-off-by: Ken Fukuyama <74d0446179da44dde65fe0e30d5ed64fa7764bc8@gmail.com>

openfaas/faas,alexellis/faas,alexellis/faas,rgee0/faas,rgee0/faas,rgee0/faas,openfaas/faas,rgee0/faas,openfaas/faas,rgee0/faas,rgee0/faas,rgee0/faas,rgee0/faas,rgee0/faas,alexellis/faas,alexellis/faas,alexellis/faas,alexellis/faas,rgee0/faas,alexellis/faas,alexellis/faas,alexellis/faas