Fix recent changes related to USABLE_SIGIO

* src/process.c (wait_reading_process_output) [WINDOWSNT]:
* src/keyboard.c (handle_async_input) [DOS_NT]: Ifdef away the
code that is not needed on MS-Windows.  (Bug#50403) (Bug#51820)

1 files changed, 2 insertions, 0 deletions

diff --git a/src/keyboard.c b/src/keyboard.c
index 5a43e9a46aa..c3bc8307d7f 100644
--- a/src/keyboard.c
+++ b/src/keyboard.c
@@ -7180,6 +7180,7 @@ tty_read_avail_input (struct terminal *terminal,
 static void
 handle_async_input (void)
 {
+#ifndef DOS_NT
   while (1)
     {
       int nread = gobble_input ();
@@ -7189,6 +7190,7 @@ handle_async_input (void)
       if (nread <= 0)
         break;
     }
+#endif
 }
 
 void