Fixed memory leaks due to missing destructor.

git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@4405 178a84e3-b1eb-0310-8ba1-8eac791a3b58

src/tracks/track_object_manager.cpp

@@ -28,6 +28,15 @@ TrackObjectManager::TrackObjectManager()
 {
 }   // TrackObjectManager
 
+// ----------------------------------------------------------------------------
+TrackObjectManager::~TrackObjectManager()
+{
+    for(unsigned int i=0; i<m_all_objects.size(); i++)
+    {
+        delete m_all_objects[i];
+    }
+}   // ~TrackObjectManager
+
 // ----------------------------------------------------------------------------
 /** Adds an object to the track object manager. The type to add is specified
  *  in the xml_node.

src/tracks/track_object_manager.hpp

@@ -38,6 +38,7 @@ public:
     std::vector<TrackObject*> m_all_objects;
 public:
          TrackObjectManager();
+        ~TrackObjectManager();
     void add(const XMLNode &xml_node, const Track &track);
     void update(float dt);
     void handleExplosion(const Vec3 &pos, const PhysicalObject *mp) const;