patch applied (ghc-6.10/ghc): avoid a crash: don't return unless the run queue has some threads in it

[Ian Lynagh]

Wed Mar 11 08:45:59 PDT 2009  Simon Marlow <marlowsd at gmail.com>
  * avoid a crash: don't return unless the run queue has some threads in it

    M ./rts/win32/AwaitEvent.c -6 +3

View patch online:
http://darcs.haskell.org/ghc-6.10/ghc/_darcs/patches/20090311154559-12142-7b13eb714e762983610362d5f99ce9d49cec22de.gz