typo correction in grp.cc

[Denis Excoffier]

Hello,

The following patch (or equivalent) is needed in order for /usr/bin/id to 
return the full set of groups
in case the user given as argument belongs to more than 10 groups:

diff -uNr cygwin-snapshot-20140523-1.original/winsup/cygwin/grp.cc 
cygwin-snapshot-20140523-1.patched/winsup/cygwin/grp.cc
--- cygwin-snapshot-20140523-1.original/winsup/cygwin/grp.cc    2014-05-23 
12:31:13.000000000 +0200
+++ cygwin-snapshot-20140523-1.patched/winsup/cygwin/grp.cc     2014-05-26 
15:08:37.542897300 +0200
@@ -656,11 +656,11 @@
          groups[cnt] = grp->gr_gid;
        ++cnt;
       }
-  *ngroups = cnt;
   if (cnt > *ngroups)
     ret = -1;
   else
     ret = cnt;
+  *ngroups = cnt;
 
   syscall_printf ( "%d = getgrouplist(%s, %u, %p, %d)",
                  ret, user, gid, groups, *ngroups);


Please apply.

Regards,

Denis Excoffier.