Improve audioengine includes slightly.

git-svn-id: svn://localhost/ardour2/branches/3.0@10326 d708f5d6-7413-0410-9779-e7cbd77b26cf

gtk2_ardour/route_params_ui.cc

@@ -25,6 +25,7 @@
 #include <gtkmm2ext/window_title.h>
 
 #include "ardour/ardour.h"
+#include "ardour/audioengine.h"
 #include "ardour/audio_diskstream.h"
 #include "ardour/audio_track.h"
 #include "ardour/plugin.h"

libs/ardour/ardour/return.h

@@ -26,7 +26,6 @@
 
 #include "pbd/stateful.h"
 #include "ardour/ardour.h"
-#include "ardour/audioengine.h"
 #include "ardour/io_processor.h"
 
 namespace ARDOUR {

libs/ardour/ardour/send.h

@@ -25,7 +25,6 @@
 #include "pbd/stateful.h"
 
 #include "ardour/ardour.h"
-#include "ardour/audioengine.h"
 #include "ardour/delivery.h"
 
 namespace ARDOUR {

libs/ardour/internal_return.cc

@@ -25,6 +25,7 @@
 #include "ardour/mute_master.h"
 #include "ardour/session.h"
 #include "ardour/internal_send.h"
+#include "ardour/audioengine.h"
 
 using namespace std;
 using namespace ARDOUR;

libs/ardour/internal_send.cc

@@ -29,6 +29,7 @@
 #include "ardour/panner_shell.h"
 #include "ardour/route.h"
 #include "ardour/session.h"
+#include "ardour/audioengine.h"
 
 #include "i18n.h"
 

libs/ardour/return.cc

@@ -31,6 +31,7 @@
 #include "ardour/return.h"
 #include "ardour/session.h"
 #include "ardour/mute_master.h"
+#include "ardour/audioengine.h"
 
 #include "i18n.h"