[boost] program_options: compilation fixes

From: Graham Bennett (graham-boost_at_[hidden])
Date: 2004-12-19 10:43:42

Hi,

parsers.cpp and value_semantic.cpp in 1.32.0 both use 'tolower' without
including <cctype>, which on my platform is not included as a
side-effect of one of the other headers.  I have attached patches which
make it compile cleanly for me.

Thanks,

Graham.

-- 
Graham Bennett