Yarn's patch which allows FreeSpace fonts to support all characters that exist in both Code Page 437 and Windows-1252

git-svn-id: svn://svn.icculus.org/fs2open@10923 387891d4-d844-0410-90c0-e4c51a9137d3
for Mantis #2153: MageKing17's FRED support for error messages when wingmen have illegal weapons

git-svn-id: svn://svn.icculus.org/fs2open@10924 387891d4-d844-0410-90c0-e4c51a9137d3