[PATCH] Replace some literal consts with enums.

[Andrew Cagney]

> 2002-01-31  Michael Snyder  <msnyder@redhat.com>
> 
> * symfile.h (enum overlay_debugging_state): 
> 	Define enum constant values for overlay mode.
> 	* symfile.c (overlay_debugging): Use enums instead of literals.
> 	(overlay_is_mapped, overlay_auto_command, 
> 	overlay_manual_command): Ditto.	
> 
> 

Michael, check set_auto_boolean_cmd().

Andrew