[newlib-cygwin] Cygwin: pty: Fix a bug on redirecting something to /dev/pty*.

[newlib-cygwin] Cygwin: pty: Fix a bug on redirecting something to /dev/pty*.

[Corinna Vinschen]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=e0a53d66256ba720fa3ad9f4eaef94da1df11463

commit e0a53d66256ba720fa3ad9f4eaef94da1df11463
Author: Takashi Yano via Cygwin-patches <cygwin-patches@cygwin.com>
Date:   Sat Jul 18 13:48:47 2020 +0900

    Cygwin: pty: Fix a bug on redirecting something to /dev/pty*.
    
    - After commit 0365031ce1347600d854a23f30f1355745a1765c, key input
      becomes not working by following steps.
       1) Start cmd.exe in mintty.
       2) Open another mintty.
       3) Execute "echo AAA > /dev/pty*" (pty* is the pty opened in 1.)
      This patch fixes the issue.

Diff:
---
 winsup/cygwin/fhandler_tty.cc | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/winsup/cygwin/fhandler_tty.cc b/winsup/cygwin/fhandler_tty.cc
index a61167116..6a004f3a5 100644
--- a/winsup/cygwin/fhandler_tty.cc
+++ b/winsup/cygwin/fhandler_tty.cc
@@ -969,11 +969,6 @@ fhandler_pty_slave::open (int flags, mode_t)
       init_console_handler (true);
     }
 
-  isHybrid = false;
-  get_ttyp ()->pcon_pid = 0;
-  get_ttyp ()->switch_to_pcon_in = false;
-  get_ttyp ()->switch_to_pcon_out = false;
-
   set_open_status ();
   return 1;