Add missing include guards in libardour header files

libs/ardour/ardour/automation_watch.h

@@ -16,6 +16,8 @@
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
 */
+#ifndef __ardour_automation_watch_h__
+#define __ardour_automation_watch_h__
 
 #include <set>
 #include <boost/shared_ptr.hpp>
@@ -60,3 +62,5 @@ class LIBARDOUR_API AutomationWatch : public sigc::trackable, public ARDOUR::Ses
 };
 
 }
+
+#endif // __ardour_automation_watch_h__

libs/ardour/ardour/midi_automation_list_binder.h

@@ -17,6 +17,9 @@
 
 */
 
+#ifndef __ardour_midi_automation_list_binder_h__
+#define __ardour_midi_automation_list_binder_h__
+
 #include "pbd/memento_command.h"
 #include "evoral/Parameter.hpp"
 #include "ardour/session.h"
@@ -41,5 +44,6 @@ private:
 	Evoral::Parameter _parameter;
 };
 
-}
+} // namespace ARDOUR
 
+#endif // __ardour_midi_automation_list_binder_h__