Fixed GCC 2 build.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@30424 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/apps/debuganalyzer/gui/thread_window/WaitObjectsPage.cpp

@@ -94,6 +94,9 @@ private:
 		}
 	};
 
+	// For GCC 2
+	friend struct ObjectNode;
+
 	struct GroupNode : Node {
 		Model::ThreadWaitObjectGroup*	group;
 		BObjectList<ObjectNode>			objectNodes;
@@ -133,6 +136,9 @@ private:
 		}
 	};
 
+	// For GCC 2
+	friend struct GroupNode;
+
 	struct RootNode : Node {
 		Model::Thread*			thread;
 		BObjectList<GroupNode>	groupNodes;