(draw_map): Parameter bmap abused EF_MAP and EF_BMAP, and required the

silly EF_NMAP.  Use characters instead: 'b' for bmap (was EF_BMAP),
't' for true bmap (was EF_MAP), 'r' for revert (was EF_MAP+EF_BMAP,
more sillness), and 'n' for nmap (was EF_NMAP).  Callers changed.
(EF_NMAP): Remove.

include/file.h

@@ -117,9 +117,6 @@ struct empfile {
 #define EF_LAND_CHR_FLAGS	27
 #define EF_NUKE_CHR_FLAGS	28
 
-#define EF_NMAP         222	/* Kinda bogus, but used to describe a newdesmap
-				   instead of bmap or map. */
-
 struct fileinit {
     int ef_type;
     void (*init) (int, char *);