A local copy of the string is used for modifying.
* menu.h: Removed the const qualifier from Menu.name and
Menu.help_node as they are freed in destroy_menu.
* menu.c (destroy_menu): Removed the (now unnecessary) casts.
* popt.h: Removed a const qualifier to avoid compiler warnings.
* profile.c (get_profile_string): Added const qualifiers to
avoid compiler warnings. (GetSetProfile): likewise.
(GetSetProfileChar): likewise.
* profile.h (get_profile_string): likewise.
* win.c (check_movement_keys): likewise.
* win.h (check_movement_keys): likewise.
print_bytesize(). Don't assume English word ordering. Add
singular message when single block.
* win.c (print_bytesize): Remove.
(sprint_bytesize): Remove.
* win.h: Remove print_bytesize() and sprint_bytesize().