process library broken on Windows

[Simon Peyton Jones]

I'm getting this on HEAD in te '

libraries\process\System\Process\Internals.hs:106:16: warning:

    Defined but not used: data constructor 'CGid'
Indeed it looks as if CGId(..) should be exported, else createProcess is unusuable.  This looks like the right change.  Would someone like to check and make the change
Simon

diff --git a/System/Process/Internals.hs b/System/Process/Internals.hs

index 5575ac4..3e23ad5 100644

--- a/System/Process/Internals.hs

+++ b/System/Process/Internals.hs

@@ -37,6 +37,8 @@ module System.Process.Internals (

#if !defined(mingw32_HOST_OS) && !defined(__MINGW32__)

     pPrPr_disableITimers, c_execvpe,

     ignoreSignal, defaultSignal,

+#else

+    CGid(..), GroupID, UserID,

#endif

     withFilePathException, withCEnvironment,

     translate,
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