add FileSource::is_stub() declaration

diff --git a/libs/ardour/ardour/file_source.h b/libs/ardour/ardour/file_source.h
index 5898d04f0abaff68ab1d4dbf23c1032b8e267913..3d9c8c623f0e53ef2afe200f6ecc3807126f6287 100644 (file)
--- a/libs/ardour/ardour/file_source.h
+++ b/libs/ardour/ardour/file_source.h
@@ -74,6 +74,7 @@ public:
 
        void inc_use_count ();
        bool removable () const;
+        bool is_stub () const;
 
        const std::string& origin() const { return _origin; }