ociobase: detect removal from parent too

Fixes crash when copying and pasting an OCIOBase node

app/node/color/ociobase/ociobase.cpp

@@ -35,18 +35,14 @@ OCIOBaseNode::OCIOBaseNode() :
 
   SetEffectInput(kTextureInput);
 
-  connect(this, &Node::AddedToGraph, this, &OCIOBaseNode::ParentChanged);
+  connect(this, &Node::AddedToGraph, this, &OCIOBaseNode::AddedToGraph);
+  connect(this, &Node::RemovedFromGraph, this, &OCIOBaseNode::RemovedFromGraph);
 
   SetFlags(kVideoEffect);
 }
 
-void OCIOBaseNode::ParentChanged(NodeGraph *graph)
+void OCIOBaseNode::AddedToGraph(NodeGraph *graph)
 {
-  if (manager_) {
-    disconnect(manager_, &ColorManager::ConfigChanged, this, &OCIOBaseNode::ConfigChanged);
-    manager_ = nullptr;
-  }
-
   if (Project *p = dynamic_cast<Project*>(graph)) {
     manager_ = p->color_manager();
     connect(manager_, &ColorManager::ConfigChanged, this, &OCIOBaseNode::ConfigChanged);
@@ -54,6 +50,14 @@ void OCIOBaseNode::ParentChanged(NodeGraph *graph)
   }
 }
 
+void OCIOBaseNode::RemovedFromGraph()
+{
+  if (manager_) {
+    disconnect(manager_, &ColorManager::ConfigChanged, this, &OCIOBaseNode::ConfigChanged);
+    manager_ = nullptr;
+  }
+}
+
 void OCIOBaseNode::Value(const NodeValueRow &value, const NodeGlobals &globals, NodeValueTable *table) const
 {
   if (value[kTextureInput].toTexture() && processor_) {

app/node/color/ociobase/ociobase.h

@@ -51,7 +51,9 @@ private:
   ColorProcessorPtr processor_;
 
 private slots:
-  void ParentChanged(olive::NodeGraph *graph);
+  void AddedToGraph(NodeGraph *graph);
+
+  void RemovedFromGraph();
 
 };