declaring function pointers with explicit prototypes for the info reader

[Patrice Dumas]

Hello,

In standalone info reader code in info/ most function pointers are
declared as a generic function pointer VFunction *, defined in info.h as

typedef void VFunction ();

I think that it would be much better to use actual prototypes depending
on the functions to have type checking by the compiler.  I started doing
that and did not find any evident issue with having explicit prototypes,
but I may be missing something.

Would there be any reason not to have explicit prototypes?

-- 
Pat