[hurd,commited] hurd: Restore destroying receive rights on sigreturn

[Samuel Thibault]

Just subtracting a ref is making signal/tst-signal signal/tst-raise
signal/tst-minsigstksz-5 htl/tst-raise1 fail.
---
 sysdeps/mach/hurd/i386/sigreturn.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sysdeps/mach/hurd/i386/sigreturn.c 
b/sysdeps/mach/hurd/i386/sigreturn.c
index 29c9629f45..4f19671069 100644
--- a/sysdeps/mach/hurd/i386/sigreturn.c
+++ b/sysdeps/mach/hurd/i386/sigreturn.c
@@ -102,8 +102,8 @@ __sigreturn (struct sigcontext *scp)
      reply port in use by the thread when interrupted.  */
   reply_port = THREAD_GETMEM (THREAD_SELF, reply_port);
   THREAD_SETMEM (THREAD_SELF, reply_port, scp->sc_reply_port);
-  __mach_port_mod_refs (__mach_task_self (), reply_port,
-                        MACH_PORT_RIGHT_RECEIVE, -1);
+  if (MACH_PORT_VALID (reply_port))
+    __mach_port_destroy (__mach_task_self (), reply_port);
 
   if (scp->sc_fpused)
     /* Restore the FPU state.  Mach conveniently stores the state
-- 
2.39.2