Add old local comment about bomb animation so it doesn't go missing.

git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@9152 178a84e3-b1eb-0310-8ba1-8eac791a3b58

src/items/attachment.cpp

@@ -276,6 +276,9 @@ void Attachment::update(float dt)
         // Everything is done in the plugin.
         break;
     case ATTACH_BOMB:
+        // Mesh animation frames are 1 to 61 frames (60 steps)
+        // The idea is change second by second, counterclockwise 60 to 0 secs
+        // If longer times needed, it should be a surprise "oh! bomb activated!"
         if(m_time_left <= (m_node->getEndFrame() - m_node->getStartFrame()-1))
         {
             m_node->setCurrentFrame(m_node->getEndFrame()