patch applied (ghc): fix warnings with gcc 4.3

[Simon Marlow]

Wed Jun 18 07:43:07 PDT 2008  Simon Marlow <marlowsd at gmail.com>
  * fix warnings with gcc 4.3

    M ./rts/STM.c -2 +2

View patch online:
http://darcs.haskell.org/ghc/_darcs/patches/20080618144307-12142-61a6c29f95f1d5b36769c0f92195d4212738b782.gz