Avoid scaling attachment which isn't bubblegum shield

git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@14311 178a84e3-b1eb-0310-8ba1-8eac791a3b58

src/items/attachment.cpp

@@ -54,8 +54,6 @@ Attachment::Attachment(AbstractKart* kart)
     m_bubble_explode_sound = NULL;
     m_node_scale           = 1.0f;
 
-	m_wanted_node_scale = std::max(1.0f, kart->getHighestPoint()*1.1f);
-
     // If we attach a NULL mesh, we get a NULL scene node back. So we
     // have to attach some kind of mesh, but make it invisible.
     m_node = irr_driver->addAnimatedMesh(
@@ -389,6 +387,9 @@ void Attachment::update(float dt)
     if(m_type==ATTACH_NOTHING) return;
     m_time_left -=dt;
     
+    float m_wanted_node_scale = m_type==ATTACH_BUBBLEGUM_SHIELD ?
+        std::max(1.0f, m_kart->getHighestPoint()*1.1f) : 1.0f;
+    
     if (m_node_scale < m_wanted_node_scale)
     {
         m_node_scale += dt*1.5f;

src/items/attachment.hpp

@@ -80,9 +80,6 @@ private:
     /** For zoom-in animation */
     float           m_node_scale;
 
-    /** Scale for bubblegum shield */ 
- 	float           m_wanted_node_scale; 
-
     /** Scene node of the attachment, which will be attached to the kart's
      *  scene node. */
     scene::IAnimatedMeshSceneNode