Followup fix for mantis 2883 (from Yarn)

Set Lcl_special_chars when changing fonts
Change some copyright chars to use Lcl_special_chars

git-svn-id: svn://svn.icculus.org/fs2open@11016 387891d4-d844-0410-90c0-e4c51a9137d3
Silence GCC warning variable ‘max_size’ set but not used

Code seems redundant as dscap_get_raw_data checks for a max size
anyway. And AFAIK the entire voice capture code is non-functional anyway

git-svn-id: svn://svn.icculus.org/fs2open@11017 387891d4-d844-0410-90c0-e4c51a9137d3