Enabling perm_invent with 'O' ('m O' these days) with curses used to
work but stopped at some point. Analysis by entrez has attributed
the change to the g.program_state.in_docrt flag in docrt(). When
curses creates the perm_invent window for update_inventory(), it
calls docrt() to have nethack redraw the screen.
docrt() -> update_inventory() -> curses_update_inventory() -> ...
-> curs_reset_windows() -> doredraw() -> docrt() [early return]
resulted in room for the persistent inventory window but it was
blank.
This also replaces a couple of doredraw() calls with direct calls to
docrt() (one in code that isn't used). doredraw() implements a user
command; docrt() does the actual redrawing.
5c7f2945da