Fix invisible gold symbol in status lines

include/extern.h

@@ -142,6 +142,7 @@ E int NDECL(getbones);
 /* ### botl.c ### */
 
 E char *NDECL(do_statusline1);
+E void NDECL(check_gold_symbol);
 E char *NDECL(do_statusline2);
 E int FDECL(xlev_to_rank, (int));
 E int FDECL(title_to_mon, (const char *, int *, int *));

include/flag.h

@@ -191,6 +191,7 @@ struct instance_flags {
      * behaviour of various NetHack functions and probably warrant
      * a structure of their own elsewhere some day.
      */
+    boolean invis_goldsym; /* gold symbol is ' '? */
     int parse_config_file_src;  /* hack for parse_config_line() */
     int in_lava_effects;   /* hack for Boots_off() */
     int last_msg;          /* indicator of last message player saw */