From 10d70bd8a9ff70824fe4945dd2fef41c44a721fd Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Sat, 11 Nov 2006 23:38:13 +0000
Subject: do not crash in IO Selector when there are no ports

git-svn-id: svn://localhost/ardour2/trunk@1111 d708f5d6-7413-0410-9779-e7cbd77b26cf
---
 gtk2_ardour/io_selector.cc | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/gtk2_ardour/io_selector.cc b/gtk2_ardour/io_selector.cc
index e800f9311b..4c1e94ce89 100644
--- a/gtk2_ardour/io_selector.cc
+++ b/gtk2_ardour/io_selector.cc
@@ -480,8 +480,10 @@ IOSelector::display_ports ()
 	if (!selected_port_tview) {
 		selected_port_tview = firsttview;
 	}
-	
-	select_treeview (selected_port_tview);
+
+	if (selected_port_tview) {
+		select_treeview (selected_port_tview);
+	}
 }
 
 bool
@@ -645,6 +647,10 @@ IOSelector::select_next_treeview ()
 {
 	slist<TreeView*>::iterator next;
 
+	if (port_displays.empty() || port_displays.size() == 1) {
+		return;
+	}
+
 	for (slist<TreeView *>::iterator i = port_displays.begin(); i != port_displays.end(); ++i) {
 
 		if ((*i)->get_name() == "IOSelectorPortListSelected") {
@@ -701,8 +707,6 @@ IOSelector::select_treeview (TreeView* tview)
 			gtk_widget_queue_draw (ccol->button);
 		}
 		
-		Port* port = reinterpret_cast<Port *> ((*i)->get_data (_("port")));
-		
 		(*i)->set_name ("IOSelectorPortList");
 		(*i)->queue_draw ();
 	}
-- 
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