(kbd_buffer_get_event): Return Qnil when current time is exactly equal to

end_time, not only when it is past that.

src/ChangeLog

+2006-08-05  Eli Zaretskii  <eliz@gnu.org>
+
+	* keyboard.c (kbd_buffer_get_event): Return Qnil when current time
+	is exactly equal to end_time, not only when it is past that.
+
 2006-08-04  Chong Yidong  <cyd@stupidchicken.com>
 	* keyboard.c (read_char): Rebalance specpdl after receiving jump.

src/keyboard.c

@@ -3954,13 +3954,15 @@ kbd_buffer_get_event (kbp, used_mouse_menu, end_time)
 	{
 	  EMACS_TIME duration;
 	  EMACS_GET_TIME (duration);
-	  EMACS_SUB_TIME (duration, *end_time, duration);
-	  if (EMACS_TIME_NEG_P (duration))
-	    return Qnil;
+	  if (EMACS_TIME_GE (duration, *end_time))
+	    return Qnil;	/* finished waiting */
 	  else
-	    wait_reading_process_output (EMACS_SECS (duration),
-					 EMACS_USECS (duration), 
-					 -1, 1, Qnil, NULL, 0);
+	    {
+	      EMACS_SUB_TIME (duration, *end_time, duration);
+	      wait_reading_process_output (EMACS_SECS (duration),
+					   EMACS_USECS (duration),
+					   -1, 1, Qnil, NULL, 0);
+	    }
 	}
       else
 	wait_reading_process_output (0, 0, -1, 1, Qnil, NULL, 0);