PatR 0ae84411a0 option fixes and missing prototypes ...

I added -Wmissing-prototypes to my CFLAGS and got a bunch of warnings.
This fixes the core ones (there are more for X11 that I haven't looked
at yet).  While fixing these, I discovered a few option processing
issues:  the non-Amiga 'altmeta' should be settable while the game is
in progress (not sure about the Amiga variation so left that as-is),
'altmeta' and 'menucolor' are booleans so shouldn't have had optfn_XXX
functions; 'MACgraphics' and 'subkeyvalue' were conditionally defined
differently in options.c than in optlist.h.

2020-04-22 13:39:38 -07:00

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