* added pointer checks * fixed typos in comments git-svn-id: svn://localhost/ardour2/branches/3.0@4234 d708f5d6-7413-0410-9779-e7cbd77b26cf
* added pointer checks * fixed typos in comments git-svn-id: svn://localhost/ardour2/branches/3.0@4234 d708f5d6-7413-0410-9779-e7cbd77b26cf