-Cleanup [Squirrel]: remove extern "C" statements; we won't be exporting things to C from our squirrel


git-svn-id: svn://svn.openttd.org@26779 6aa0318a-3be1-0310-93fa-89fd2396df07
-Cleanup: remove unused SQUIRREL_API macro


git-svn-id: svn://svn.openttd.org@26780 6aa0318a-3be1-0310-93fa-89fd2396df07
-Codechange [Squirrel]: remove includes/definitions that are already in stdafx.h


git-svn-id: svn://svn.openttd.org@26781 6aa0318a-3be1-0310-93fa-89fd2396df07
-Fix (r26781): was in the wrong folder when commiting


git-svn-id: svn://svn.openttd.org@26782 6aa0318a-3be1-0310-93fa-89fd2396df07
-Fix (r26781): removed one include too many


git-svn-id: svn://svn.openttd.org@26783 6aa0318a-3be1-0310-93fa-89fd2396df07