[newlib-cygwin] Cygwin: FIFO: update_my_handlers: fix handle leak

[Ken Brown]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=26a5aff2a90fb7b2536ec64cfe87fc403ea3c5a0

commit 26a5aff2a90fb7b2536ec64cfe87fc403ea3c5a0
Author: Ken Brown <kbrown@cornell.edu>
Date:   Fri Nov 6 08:16:45 2020 -0500

    Cygwin: FIFO: update_my_handlers: fix handle leak

Diff:
---
 winsup/cygwin/fhandler_fifo.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/winsup/cygwin/fhandler_fifo.cc b/winsup/cygwin/fhandler_fifo.cc
index 75c8406fe..3af7e2f72 100644
--- a/winsup/cygwin/fhandler_fifo.cc
+++ b/winsup/cygwin/fhandler_fifo.cc
@@ -457,6 +457,7 @@ fhandler_fifo::update_my_handlers ()
 	}
     }
   fifo_client_unlock ();
+  NtClose (prev_proc);
   set_prev_owner (null_fr_id);
   return ret;
 }