get rid of redundant searching for module exports in renamer
get rid of redundant searching for module exports in renamer

Ignore-this: dbd7c14d07437a0a7ad71ea97e510198

darcs-hash:20100715201919-1a7c6-65f74099c55141c5cae65c997947f268d911d084

jimcrayne/jhc,jimcrayne/jhc,jimcrayne/jhc,jimcrayne/jhc