More gracefully handle error objects with a non-number 'code' attribute.
More gracefully handle error objects with a non-number 'code' attribute.

eoger/fxa-auth-server,mozilla/fxa-auth-server,jamonation/fxa-auth-server,dannycoates/picl-idp,shane-tomlinson/fxa-auth-server,jrgm/fxa-auth-server,TDA/fxa-auth-server,eoger/fxa-auth-server,jrgm/fxa-auth-server,chilts/fxa-auth-server,chilts/fxa-auth-server,chilts/fxa-auth-server,chilts/fxa-auth-server,mozilla/fxa-auth-server,jamonation/fxa-auth-server,shane-tomlinson/fxa-auth-server,jamonation/fxa-auth-server,TDA/fxa-auth-server,shane-tomlinson/fxa-auth-server,dannycoates/picl-idp,jrgm/fxa-auth-server,eoger/fxa-auth-server,jrgm/fxa-auth-server,TDA/fxa-auth-server,jamonation/fxa-auth-server,eoger/fxa-auth-server,dannycoates/picl-idp,mozilla/fxa-auth-server,dannycoates/picl-idp,TDA/fxa-auth-server,mozilla/fxa-auth-server,shane-tomlinson/fxa-auth-server