wizmode level teleport via menu

If you answer '?' to the level teleport prompt
in debug mode, you get a menu to choose
from, similar to the control-O print_dungeon
display.

include/extern.h

@@ -505,7 +505,7 @@ E boolean FDECL(Invocation_lev, (d_level *));
 E xchar NDECL(level_difficulty);
 E schar FDECL(lev_by_name, (const char *));
 #ifdef WIZARD
-E void NDECL(print_dungeon);
+E schar FDECL(print_dungeon, (BOOLEAN_P));
 #endif
 
 /* ### eat.c ### */

include/wintype.h

@@ -13,6 +13,7 @@ typedef union any {
     struct obj *a_obj;
     int  a_int;
     char a_char;
+    schar a_schar;
     /* add types as needed */
 } anything;
 #define ANY_P union any /* avoid typedef in prototypes */