Fix #1783: repeated error message on console

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

diff --git a/simgear/props/PropertyBasedElement.cxx b/simgear/props/PropertyBasedElement.cxx
index 348842b9142342eb979286eb03ab1d4755cb33b9..f9f7fb278042a726dedf7dd390c664f0f5759a2a 100644 (file)
--- a/simgear/props/PropertyBasedElement.cxx
+++ b/simgear/props/PropertyBasedElement.cxx
@@ -39,7 +39,8 @@ namespace simgear
   //----------------------------------------------------------------------------
   void PropertyBasedElement::removeListener()
   {
-    _node->removeChangeListener(this);
+    if( _node )
+      _node->removeChangeListener(this);
   }
 
   //----------------------------------------------------------------------------