Bugfix: null check on oov_list
Bugfix: null check on oov_list

thammegowda/incubator-joshua,lukeorland/joshua,lukeorland/joshua,fhieber/incubator-joshua,fhieber/incubator-joshua,thammegowda/incubator-joshua,lukeorland/joshua,lukeorland/joshua,thammegowda/incubator-joshua,thammegowda/incubator-joshua,thammegowda/incubator-joshua,fhieber/incubator-joshua,fhieber/incubator-joshua,thammegowda/incubator-joshua,lukeorland/joshua,thammegowda/incubator-joshua,fhieber/incubator-joshua,thammegowda/incubator-joshua,lukeorland/joshua,fhieber/incubator-joshua,fhieber/incubator-joshua,lukeorland/joshua,thammegowda/incubator-joshua,lukeorland/joshua,fhieber/incubator-joshua,thammegowda/incubator-joshua,lukeorland/joshua,fhieber/incubator-joshua