pgraph: Add missing InstancedNode::CData type handle

panda/src/pgraph/instancedNode.cxx

@@ -18,6 +18,7 @@
 #include "cullPlanes.h"
 
 TypeHandle InstancedNode::_type_handle;
+TypeHandle InstancedNode::CData::_type_handle;
 
 /**
  *

panda/src/pgraph/instancedNode.h

@@ -92,6 +92,17 @@ private:
     COWPT(InstanceList) _instances;
 
     friend class InstancedNode;
+
+  public:
+    static TypeHandle get_class_type() {
+      return _type_handle;
+    }
+    static void init_type() {
+      register_type(_type_handle, "InstancedNode::CData");
+    }
+
+  private:
+    static TypeHandle _type_handle;
   };
 
   PipelineCycler<CData> _cycler;