Fix possible null pointer access

* src/term.c (Ftty__output_buffer_size): Handle case of
decode_tty_terminal returning NULL.

diff --git a/src/term.c b/src/term.c
index 231324d002a13488d43c23517bcf6216b4ad063d..f8104e0304e368811cfa33608f5185718641ed4b 100644 (file)
--- a/src/term.c
+++ b/src/term.c
@@ -2433,7 +2433,9 @@ A value of zero means TTY uses the system's default value.  */)
   (Lisp_Object tty)
 {
   struct terminal *terminal = decode_tty_terminal (tty);
-  return make_fixnum (terminal->display_info.tty->output_buffer_size);
+  if (terminal)
+    return make_fixnum (terminal->display_info.tty->output_buffer_size);
+  error ("Not a tty terminal");
 }
 
 \f