fixed memory leak

git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/trunk/supertuxkart@2314 178a84e3-b1eb-0310-8ba1-8eac791a3b58

src/modes/follow_the_leader.hpp

@@ -25,7 +25,7 @@ class FollowTheLeaderRace : public LinearWorld, public Clock::ClockListener
     std::vector<float>  m_leader_intervals;    // time till elimination in follow leader
 public:
     FollowTheLeaderRace();
-    ~FollowTheLeaderRace();
+    virtual ~FollowTheLeaderRace();
     
     // clock events
     virtual void countdownReachedZero();

src/modes/linear_world.cpp

@@ -72,6 +72,11 @@ LinearWorld::LinearWorld() : World()
     }// next kart
 }
 //-----------------------------------------------------------------------------
+LinearWorld::~LinearWorld()
+{
+    delete[] m_kart_display_info;
+}
+//-----------------------------------------------------------------------------
 void LinearWorld::restartRace()
 {
     World::restartRace();

src/modes/linear_world.hpp

@@ -61,6 +61,7 @@ protected:
     
 public:
     LinearWorld();
+    virtual ~LinearWorld();
     
     /** This vector contains an 'KartInfo' struct for every kart in the race.
       * This member is not strictly private but try not to use it directly outside

src/modes/standard_race.hpp

@@ -28,7 +28,7 @@ class StandardRace : public LinearWorld, public Clock::ClockListener
 {
 public:
     StandardRace();
-    ~StandardRace();
+    virtual ~StandardRace();
     
     // clock events
     virtual void countdownReachedZero();