There was no provision for malloc() potentially returning Null and it
wasn't integrated with nethack's MONITOR_HEAP. 'heaputil' shows that
the curses interface is leaking like a sieve. If some things are
actually being allocated separately and then freed from within curses,
those need to be thoroughly documented and maybe switched back to
malloc().
Caught by automated build test
../win/curses/cursdial.c:598:9: error: non-void function 'curses_display_nhmenu' should return a value [-Wreturn-type]
return;
^
../win/curses/cursdial.c:605:9: error: non-void function 'curses_display_nhmenu' should return a value [-Wreturn-type]
return;
