From MageKing17: Improves sexp help text to clear up possible confusion about indexes that are zero-based.

git-svn-id: svn://svn.icculus.org/fs2open/trunk@10920 387891d4-d844-0410-90c0-e4c51a9137d3
From MageKing17: Fixes for a couple of clang warnings.

git-svn-id: svn://svn.icculus.org/fs2open/trunk@10921 387891d4-d844-0410-90c0-e4c51a9137d3
Fixes an unintended linebreak removal in previous commit


git-svn-id: svn://svn.icculus.org/fs2open/trunk@10922 387891d4-d844-0410-90c0-e4c51a9137d3
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/trunk@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/trunk@10924 387891d4-d844-0410-90c0-e4c51a9137d3