add missing header for luadoc

diff --git a/libs/ardour/luabindings.cc b/libs/ardour/luabindings.cc
index 55c445e8340d5add7f07aa4cae578855971490a5..5b66018c26e501b5557885b9bd6f644cecce32b1 100644 (file)
--- a/libs/ardour/luabindings.cc
+++ b/libs/ardour/luabindings.cc
@@ -48,6 +48,7 @@
 #include "ardour/runtime_functions.h"
 #include "ardour/region.h"
 #include "ardour/region_factory.h"
+#include "ardour/route_group.h"
 #include "ardour/session.h"
 #include "ardour/session_object.h"
 #include "ardour/sidechain.h"