Make the project compilable

Car.cpp

@@ -92,9 +92,12 @@ void Car::jump( float32 correction )
 {
      // Jump
      b2Vec2 spring;
+     b2Vec2 forcePoint;
+
      spring.Set( 0.0f, -1.7f );
+     forcePoint.Set( 0.0f, 0.0f );
 
-     m_bodyCar->ApplyLinearImpulseToCenter( spring, true );
+     m_bodyCar->ApplyLinearImpulse( spring, forcePoint, true );
 
      // Correction
      m_bodyCar->ApplyAngularImpulse( - m_bodyCar->GetAngle() * correction, true );