Fix missing virtual destructors.

git-svn-id: svn://localhost/ardour2/branches/3.0@7753 d708f5d6-7413-0410-9779-e7cbd77b26cf

gtk2_ardour/track_selection.cc

@@ -29,7 +29,10 @@ TrackSelection::TrackSelection (PublicEditor const * e, TrackViewList const &t)
 	: TrackViewList (t)
 	, _editor (e)
 {
+}
 
+TrackSelection::~TrackSelection ()
+{
 }
 
 TrackViewList

gtk2_ardour/track_selection.h

@@ -29,6 +29,8 @@ class TrackSelection : public TrackViewList
 public:
 	TrackSelection (PublicEditor const * e) : _editor (e) {}
 	TrackSelection (PublicEditor const *, TrackViewList const &);
+
+	virtual ~TrackSelection ();
 	
 	TrackViewList add (TrackViewList const &);
 

gtk2_ardour/track_view_list.cc

@@ -25,7 +25,10 @@ using namespace std;
 TrackViewList::TrackViewList (list<TimeAxisView*> const & t)
 	: list<TimeAxisView*> (t)
 {
+}
 
+TrackViewList::~TrackViewList ()
+{
 }
 
 bool

gtk2_ardour/track_view_list.h

@@ -30,6 +30,8 @@ public:
 	TrackViewList () {}
 	TrackViewList (std::list<TimeAxisView*> const &);
 
+	virtual ~TrackViewList ();
+
 	virtual TrackViewList add (TrackViewList const &);
 	bool contains (TimeAxisView const *) const;
 };

libs/ardour/ardour/graphnode.h

@@ -41,6 +41,7 @@ class GraphNode
 {
     public:
 	GraphNode( boost::shared_ptr<Graph> Graph );
+	virtual ~GraphNode();
 
 	void prep( int chain );
 	void dec_ref();

libs/ardour/ardour/public_diskstream.h

@@ -30,6 +30,7 @@ class Location;
 class PublicDiskstream
 {
 public:
+	virtual ~PublicDiskstream() {}
 
 	virtual boost::shared_ptr<Playlist> playlist () = 0;
 	virtual void monitor_input (bool) = 0;

libs/ardour/graphnode.cc

@@ -29,6 +29,10 @@ GraphNode::GraphNode (graph_ptr_t graph)
 { 
 }
 
+GraphNode::~GraphNode()
+{
+}
+
 void
 GraphNode::prep (int chain)
 {