use guarded pointers

diff --git a/src/Model/modelmgr.hxx b/src/Model/modelmgr.hxx
index cf78f475e1acece922729cb48eedc36659f44eef..073598fb147bd2a7c8e10922cbda9d5f0016cfb3 100644 (file)
--- a/src/Model/modelmgr.hxx
+++ b/src/Model/modelmgr.hxx
@@ -48,12 +48,12 @@ public:
     Instance ();
     virtual ~Instance ();
     SGModelPlacement * model;
-    SGPropertyNode * lon_deg_node;
-    SGPropertyNode * lat_deg_node;
-    SGPropertyNode * elev_ft_node;
-    SGPropertyNode * roll_deg_node;
-    SGPropertyNode * pitch_deg_node;
-    SGPropertyNode * heading_deg_node;
+    SGPropertyNode_ptr lon_deg_node;
+    SGPropertyNode_ptr lat_deg_node;
+    SGPropertyNode_ptr elev_ft_node;
+    SGPropertyNode_ptr roll_deg_node;
+    SGPropertyNode_ptr pitch_deg_node;
+    SGPropertyNode_ptr heading_deg_node;
   };
 
   FGModelMgr ();