Try to fix too bouncy bowling ball

src/items/bowling.cpp

@@ -61,7 +61,7 @@ Bowling::Bowling(AbstractKart *kart)
     const Vec3& normal = kart->getNormal();
     createPhysics(y_offset, btVector3(0.0f, 0.0f, m_speed*2),
                   new btSphereShape(0.5f*m_extend.getY()),
-                  0.8f /*restitution*/,
+                  0.4f /*restitution*/,
                   -70.0f*normal /*gravity*/,
                   true /*rotates*/);
     // Even if the ball is fired backwards, m_speed must be positive,

src/karts/kart.cpp

@@ -1481,7 +1481,7 @@ void Kart::updateTerrainInfo()
 {
     // After the physics step was done, the position of the wheels (as stored
     // in wheelInfo) is actually outdated, since the chassis was moved
-    // according to the force acting from the wheels. So the cnter of the
+    // according to the force acting from the wheels. So the center of the
     // chassis is not at the center of the wheels anymore, it is somewhat
     // moved forward (depending on speed and fps). In very extreme cases
     // (see bug 2246) the center of the chassis can actually be ahead of the