after cloning a MIDI region, mark the source file as non-removable. Fixes reports about missing MIDI files on the forums and IRC

1 files changed, 11 insertions, 1 deletions

diff --git a/libs/ardour/smf_source.cc b/libs/ardour/smf_source.cc
index 52c950e76f..4167bea877 100644
--- a/libs/ardour/smf_source.cc
+++ b/libs/ardour/smf_source.cc
@@ -72,9 +72,10 @@ SMFSource::SMFSource (Session& s, const string& path, Source::Flag flags)
 		return;
 	}
 
-	if (open(_path)) {
+	if (open (_path)) {
 		throw failed_constructor ();
 	}
+
 	_open = true;
 }
 
@@ -657,3 +658,12 @@ SMFSource::ensure_disk_file ()
 	}
 }
 
+void
+SMFSource::prevent_deletion ()
+{
+	/* Unlike the audio case, the MIDI file remains mutable (because we can
+	   edit MIDI data)
+	*/
+  
+	_flags = Flag (_flags & ~(Removable|RemovableIfEmpty|RemoveAtDestroy));
+}