Return the error code from chruby_use.
Return the error code from chruby_use.

eunomie/chgo,ngpestelos/chruby,rstacruz/chruby-fish,postmodern/chruby,rstacruz/chruby-fish,ngpestelos/chruby,eunomie/chgo,kbrock/chruby,ilikepi/chruby,regularfry/chruby,JeanMertz/chruby-fish,JeanMertz/chruby-fish,kbrock/chruby,regularfry/chruby,postmodern/chruby,ilikepi/chruby