From aa11564fef8ed9330d42081288e8f310072c67d6 Mon Sep 17 00:00:00 2001
From: David Robillard <d@drobilla.net>
Date: Fri, 7 Dec 2007 17:27:06 +0000
Subject: Fix loading selector nodes. Choosing evolution target MIDI from GUI.

git-svn-id: http://svn.drobilla.net/lad/machina@963 a436a847-0d15-0410-975c-d299462d15a1
---
 src/engine/Mutation.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

(limited to 'src/engine/Mutation.cpp')

diff --git a/src/engine/Mutation.cpp b/src/engine/Mutation.cpp
index d60ef34..a307ce5 100644
--- a/src/engine/Mutation.cpp
+++ b/src/engine/Mutation.cpp
@@ -52,10 +52,12 @@ AddNode::mutate(Machine& machine)
 	//cout << "ADD NODE" << endl;
 
 	// Create random node
-	SharedPtr<Node> node(new Node(1.0));
+	SharedPtr<Node> node(new Node());
 	node->set_selector(true);
 	
 	SharedPtr<Node> note_node = machine.random_node();
+	if (!note_node)
+		return;
 	uint8_t note = PtrCast<MidiAction>(note_node->enter_action())->event()[1];
 
 	node->set_enter_action(ActionFactory::note_on(note));
@@ -154,7 +156,7 @@ RemoveEdge::mutate(Machine& machine)
 	//cout << "REMOVE EDGE" << endl;
 
 	SharedPtr<Node> tail = machine.random_node();
-	if (tail)
+	if (tail && !(tail->is_initial() && tail->edges().size() == 1))
 		tail->remove_edge(tail->random_edge());
 }
 
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