A for loop had no braces around its body, which was a single if-else
statement. In Advanced Rogue 5, another statement had been added,
accidentally removing the if-else from the loop. This could have
resulted in an out-of-bounds access to the options array.
In the other games, the added braces are only for clarity.
Functions for printing options now return void. Functions for setting
options now return int. Argument types still vary, though converting
all the option pointers to void* would be possible.
Almost 1500 lines of compiler warnings remain, and the GCC developers
are already working on a new version with even more warnings turned on
by default.