savebones() sets all the fruit indices negative, then resets to the
normal positive value for each fruit it actually writes into the bones
file. But if 'perm_invent' is enabled and something triggers an
update_inventory() while bones saving is in progress, object formatting
for the inventory display won't be able to find any fruits, resulting
in impossible "Bad fruit #N". Fix is to turn off 'perm_invent' when
the game ends, so it won't be On when bones are written. Disclosure
uses a popup for inventory so persistent window is obsolete by then
anyway.
[I don't know what is triggering update_inventory() while savebones()
is executing. Also, I don't see where the fruits whose index stayed
negative--because there aren't any on level being saved--get purged.
Maybe when those bones are loaded by another game?]
cfc8599e69