Simplify the "is a character ready" test, so that we don't return a false

negative for keypresses with zero ascii values.  This is in line with the
comconsole test, rather than being more ambitious.

Submitted by:	rnordier

sys/boot/i386/libi386/vidconsole.c

@@ -26,7 +26,7 @@
  *
  * 	From Id: probe_keyboard.c,v 1.13 1997/06/09 05:10:55 bde Exp
  *
- *	$Id: vidconsole.c,v 1.5 1998/10/07 07:34:31 msmith Exp $
+ *	$Id: vidconsole.c,v 1.6 1998/10/11 10:07:52 peter Exp $
  */
 
 #include <stand.h>
@@ -120,9 +120,7 @@ vidc_ischar(void)
     v86.addr = 0x16;
     v86.eax = 0x100;
     v86int();
-    if (!(v86.efl & PSL_Z))
-	return(v86.eax & 0xff);
-    return(0);
+    return(!(v86.efl & PSL_Z));
 }
 
 #if KEYBOARD_PROBE