[newlib-cygwin] Cygwin: FIFO: fix a thinko in listen_client_thread

[Corinna Vinschen]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=0c72e766e2bd4b504030a502c0c46e41d268e052

commit 0c72e766e2bd4b504030a502c0c46e41d268e052
Author: Ken Brown <kbr...@cornell.edu>
Date:   Sun Apr 14 19:15:58 2019 +0000

    Cygwin: FIFO: fix a thinko in listen_client_thread

Diff:
---
 winsup/cygwin/fhandler_fifo.cc | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/winsup/cygwin/fhandler_fifo.cc b/winsup/cygwin/fhandler_fifo.cc
index 258c3cf..764420f 100644
--- a/winsup/cygwin/fhandler_fifo.cc
+++ b/winsup/cygwin/fhandler_fifo.cc
@@ -362,7 +362,10 @@ fhandler_fifo::listen_client_thread ()
                fifo_client_unlock ();
                goto errout;
              }
-           /* Fall through. */
+           else
+             /* Recheck fc_handler[i].state. */
+             i--;
+           break;
          case fc_connected:
            w[i] = fc_handler[i].dummy_evt;
            break;