make mackie control header include abstract_ui.h (might help compile/link issue on...

git-svn-id: svn://localhost/ardour2/branches/3.0@10250 d708f5d6-7413-0410-9779-e7cbd77b26cf

diff --git a/libs/surfaces/mackie/mackie_control_protocol.h b/libs/surfaces/mackie/mackie_control_protocol.h
index 2399e099d22dfa9099d4d8061159c3b19dcac236..cecfc5ea6cd7f0260d793fdca1ac603fec1a7a7f 100644 (file)
--- a/libs/surfaces/mackie/mackie_control_protocol.h
+++ b/libs/surfaces/mackie/mackie_control_protocol.h
@@ -26,6 +26,8 @@
 
 #include <glibmm/thread.h>
 
+#include "pbd/abstract_ui.h"
+
 #include "ardour/types.h"
 #include "ardour/midi_ui.h"
 #include "midi++/types.h"