Changed highlight state code for hercules, console and serial.

The state was 0 - normal or 1 - highlight.
        The state is now defined using an enum called color_state.

        * stage2/term.h (color_state): New enum.
        (COLOR_STATE_STANDARD): Standard color to use when not using user defined.
        (COLOR_STATE_NORMAL): User defined normal color.
        (COLOR_STATE_HIGHLIGHT): User defined highlight color.
        (console_highlight): Renamed to console_setcolorstate.
        (serial_highlight): Renamed to serial_setcolorstate.
        (hercules_highlight): Renamed to hercules_setcolorstate.
        * stage2/hercules.c (herc_highlight_state): Removed.
        (herc_standard_color): New variable.
        (herc_color_state): Likewise.
        (herc_highlight): Renamed to herc_setcolorstate.
        (herc_setcolorstate): Added switch to handle new states.
        * stage2/console.c (console_highlight_state): Removed.
        (console_standard_color): New variable.
        (console_color_state): Likewise.
        (console_highlight): Renamed to console_setcolorstate.
        (console_setcolorstate): Added switch to handle new states.
        * stage2/serial.c (serial_highlight): Renamed to serial_setcolorstate.
        (serial_setcolorstate): Adjusted 'if' to suit new states.
        * grub/asmstub.c (console_highlight): Renamed to console_setcolorstate.
        (console_setcolorstate): Adjusted 'if' to suit new states.
        * stage2/stage2.c (print_entry): Set color states using new states.
        (print_border): Likewise.
        * stage2/stage2.c (run_menu): Reverse if (!) to if () for uniformitty.

stage2/char_io.c

@@ -41,7 +41,7 @@ struct term_entry term_table[] =
       console_getxy,
       console_gotoxy,
       console_cls,
-      console_highlight,
+      console_setcolorstate,
       console_setcolor,
       console_nocursor
     },
@@ -56,7 +56,7 @@ struct term_entry term_table[] =
       serial_getxy,
       serial_gotoxy,
       serial_cls,
-      serial_highlight,
+      serial_setcolorstate,
       0,
       0
     },
@@ -71,7 +71,7 @@ struct term_entry term_table[] =
       hercules_getxy,
       hercules_gotoxy,
       hercules_cls,
-      hercules_highlight,
+      hercules_setcolorstate,
       hercules_setcolor,
       hercules_nocursor
     },      
@@ -1028,13 +1028,13 @@ grub_putchar (int c)
 		 the following grub_printf call will print newlines.  */
 	      count_lines = -1;
 
-	      if (current_term->highlight)
-		current_term->highlight (1);
+	      if (current_term->setcolorstate)
+		current_term->setcolorstate (COLOR_STATE_HIGHLIGHT);
 	      
 	      grub_printf ("\n[Hit return to continue]");
 
-	      if (current_term->highlight)
-		current_term->highlight (0);
+	      if (current_term->setcolorstate)
+		current_term->setcolorstate (COLOR_STATE_NORMAL);
 	      
 	      do
 		{