patch applied (packages/base): Async-exception safety, and avoid space leaks

[Simon Marlow]

Thu Jul  8 07:58:19 PDT 2010  Simon Marlow <marlowsd at gmail.com>
  * Async-exception safety, and avoid space leaks
  Patch submitted by: Bas van Dijk <v.dijk.bas at gmail.com>
  Modified slightly by me to remove non-functional changes.

    M ./Control/Concurrent/QSem.hs -9 +12

View patch online:
http://darcs.haskell.org/cgi-bin/darcsweb.cgi?r=packages/base;a=darcs_commitdiff;h=20100708145819-12142-74c11e301a871d49ecce9ea0f5dcac8498425ab0.gz