This allows us to separate accidentally unused, from explicitly unused
parameters, which allows us to turn on such checks in the compiler.

The generally recommended way is to include it from source files, not
headers. We had a mix of both. Let's try to be consistent and follow the
recommended way.

It's either not used, or no longer relevant.

Consistently use the term stride rather than pitch. Also
consistently represent the stride in number of pixels rather
than number of bytes. There is so much code that assumes
proper alignment already that we do not need the extra resolution.

git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@4760 3789f03b-4d11-0410-bbf8-ca57d06f2519

git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@4758 3789f03b-4d11-0410-bbf8-ca57d06f2519