math: Move lerp function into SGMisc.

[simgear.git] / simgear / props / props.cxx

diff --git a/simgear/props/props.cxx b/simgear/props/props.cxx
index 499d417fb06009ad0f8e6e42dadd9d0d92ff4b7b..5fe9bc90b10d88a19efe31489ceb9686b7662906 100644 (file)
--- a/simgear/props/props.cxx
+++ b/simgear/props/props.cxx
@@ -664,7 +664,8 @@ SGPropertyNode::SGPropertyNode ()
  * Copy constructor.
  */
 SGPropertyNode::SGPropertyNode (const SGPropertyNode &node)
-  : _index(node._index),
+  : SGReferenced(node),
+    _index(node._index),
     _name(node._name),
     _parent(0),                        // don't copy the parent
     _type(node._type),