Some mindless changes to fix typos, make the compiler happy, etc.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/rgl@1004 79a1b648-8b68-254f-b20b-c0b50f5137bf
subscenes is a branch

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/rgl@1005 79a1b648-8b68-254f-b20b-c0b50f5137bf