Fix class cast exception when dumping the mixers:  the underlying system may give us Port objects in addition to DataLine objects.
Fix class cast exception when dumping the mixers:  the
underlying system may give us Port objects in addition
to DataLine objects.


git-svn-id: a8b04003a33e1d3e001b9d20391fa392a9f62d91@3980 94700074-3cef-4d97-a70e-9c8c206c02f5

deepstupid/sphinx5