Fix WINDOWSNT/DOS_NT build

Recent changes in sysdep.c and emacsclient unnecessarily
removed useful code from DOS_NT builds.  This changeset
reinstates that code.
* nt/inc/ms-w32.h (tcdrain): Redirect to _commit.
(fdatasync): No need to redirect anymore.

* lib-src/emacsclient.c (flush_stdout): Don't avoid calling
tcdrain on DOS_NT platforms.

* src/sysdep.c (reset_sys_modes): Don't ifdef away the call to
tcdrain on DOS_NT platforms.

1 files changed, 0 insertions, 2 deletions

diff --git a/lib-src/emacsclient.c b/lib-src/emacsclient.c
index a428788344e..c430217470f 100644
--- a/lib-src/emacsclient.c
+++ b/lib-src/emacsclient.c
@@ -1745,10 +1745,8 @@ static void
 flush_stdout (HSOCKET emacs_socket)
 {
   fflush (stdout);
-#ifndef DOS_NT
   while (tcdrain (STDOUT_FILENO) != 0 && errno == EINTR)
     act_on_signals (emacs_socket);
-#endif
 }
 
 int