audio/ardour: Fix runtime error

Undefined symbol at runtime when building with default options

Upstream PR: https://github.com/Ardour/ardour/pull/883

PR:		277938
Reported by:	phryk-ports@wzff.de
Approved by:	dev@submerge.ch	(maintainer)

audio/ardour/Makefile

@@ -1,5 +1,6 @@
 PORTNAME=	ardour
 DISTVERSION=	8.4.0
+PORTREVISION=	1
 CATEGORIES=	audio
 # Official source download is tailored to browsers, downloads from github are
 # deliberately made empty. Put the badly named distfile into a subdirectory.

audio/ardour/files/patch-libs_ardour_session.cc

@@ -0,0 +1,26 @@
+--- libs/ardour/session.cc.orig	2024-02-21 00:37:39 UTC
++++ libs/ardour/session.cc
+@@ -136,7 +136,10 @@
+ #include "ardour/utils.h"
+ #include "ardour/vca_manager.h"
+ #include "ardour/vca.h"
++
++#ifdef VST3_SUPPORT
+ #include "ardour/vst3_plugin.h"
++#endif // VST3_SUPPORT
+ 
+ #include "midi++/port.h"
+ #include "midi++/mmc.h"
+@@ -881,10 +884,12 @@ Session::destroy ()
+ 
+ 	_transport_fsm->stop ();
+ 
++#ifdef VST3_SUPPORT
+ 	/* close VST3 Modules */
+ 	for (auto const& nfo : PluginManager::instance().vst3_plugin_info()) {
+ 		std::dynamic_pointer_cast<VST3PluginInfo> (nfo)->m.reset ();
+ 	}
++#endif // VST3_SUPPORT
+ 
+ 	DEBUG_TRACE (DEBUG::Destruction, "Session::destroy() done\n");
+