part two of: don't crash during startup with no config files when trying to use a non-existent MIDI Manager object

git-svn-id: svn://localhost/ardour2/branches/3.0@7501 d708f5d6-7413-0410-9779-e7cbd77b26cf
This commit is contained in:
Paul Davis 2010-07-26 15:28:59 +00:00
parent edf09354fb
commit f2df65db6a