Detach attachment anvil now works correctly

git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/trunk/supertuxkart@1209 178a84e3-b1eb-0310-8ba1-8eac791a3b58

src/attachment.cpp

@@ -145,13 +145,14 @@ void Attachment::update(float dt, sgCoord *velocity)
     // Detach attachment if its time is up.
     if ( m_time_left <= 0.0f)
     {
-        clear();
         if(m_type==ATTACH_ANVIL) 
         {
             // Resets the weight, and multiplies the velocity by 1.0, 
             // i.e. no change of velocity.
+            m_kart->getAttachment()->clear();
             m_kart->adjustSpeedWeight(1.0f);
         }
+        clear();
     }   // if m_time_left<0
 }   // update
 //-----------------------------------------------------------------------------