From 5b0d3f8cb549d07a09dc297f3660c19ae3fdaf7a Mon Sep 17 00:00:00 2001
From: Bruce Mitchener <bruce.mitchener@gmail.com>
Date: Tue, 26 Jan 2021 12:05:42 +0700
Subject: [PATCH] Use FD_CLR when disabling keyboard for SUNDISPLAY. (#299)

In the old code (prior to b234064d), this was:

```
   LispReadFds &= ~(1 << LispWindowFd);
```

This was inadvertently converted to `FD_SET`, but should have
been `FD_CLR`.
---
 src/kbdsubrs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/kbdsubrs.c b/src/kbdsubrs.c
index 13d2375..950eb30 100644
--- a/src/kbdsubrs.c
+++ b/src/kbdsubrs.c
@@ -86,7 +86,7 @@ void KB_enable(LispPTR *args) /* args[0] :	ON/OFF flag
 #endif /* DOS */
   } else if (args[0] == NIL) {
 #ifdef SUNDISPLAY
-    FD_SET(LispWindowFd, &LispReadFds);
+    FD_CLR(LispWindowFd, &LispReadFds);
 #elif XWINDOW
     disable_Xkeyboard(currentdsp);
 #elif DOS