Exposing `scm_i_mem2number ()'

[Ludovic Courtès]

Hi,

I think it'd be nice to export `scm_i_mem2number ()'.  My initial plan
was to just rename it `scm_c_string_to_number ()' and document it.

However, due to the eventual support for various encodings, we'd rather
need to have something like `scm_c_locale_string_to_number ()'.  The
problem is: how do we handle the LEN argument for arbitrary encodings?
Should it be documented as the number of chars (not octets) that compose
the string?

Suggestions?

Thanks,
Ludovic.