The save and restore code assumed sizeof(long) == 4, which is not the
case on x64. Reading only 4 bytes from the savefile left the others
uninitialized, which led to problems like billions of experience points
or gold pieces.
state.c now saves the fuse that refills alchemy jugs, using the method
of numbering objects previously applied to Advanced Rogue 5. Alchemy
jugs that are empty when the game is saved will continue to function
after it is restored.
Savefile compatibility should not be affected.
