Tidy up a bit in the case where the port matrix has nothing to display.

git-svn-id: svn://localhost/ardour2/branches/3.0@6089 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 4 insertions, 2 deletions

diff --git a/gtk2_ardour/port_group.h b/gtk2_ardour/port_group.h
index 27698ddbb0..e367adec9b 100644
--- a/gtk2_ardour/port_group.h
+++ b/gtk2_ardour/port_group.h
@@ -122,13 +122,15 @@ class PortGroupList : public sigc::trackable
 	void resume_signals ();
 
 	List::const_iterator begin () const {
-		return _groups.begin();
+		return _groups.begin ();
 	}
 
 	List::const_iterator end () const {
-		return _groups.end();
+		return _groups.end ();
 	}
 
+	bool empty () const;
+
 	sigc::signal<void> Changed;
 	sigc::signal<void, ARDOUR::Bundle::Change> BundleChanged;