Don't show music desc when music is off

git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/branches/irrlicht@3869 178a84e3-b1eb-0310-8ba1-8eac791a3b58

src/input/input_manager.cpp

@@ -501,7 +501,7 @@ bool InputManager::input(const SEvent& event)
          */
     }
 #endif
-
+    
     // block events in all modes but initial menus (except in text boxes to allow typing)
     return getDeviceList()->playerAssignMode() != NO_ASSIGN && !GUIEngine::isWithinATextBox;
 }

src/states_screens/race_gui.cpp

@@ -534,6 +534,8 @@ void RaceGUI::addMessage(const std::string &msg, const Kart *kart, float time,
 // usually the title and composer.
 void RaceGUI::drawMusicDescription()
 {
+    if (!UserConfigParams::m_music) return; // show no music description when it's off
+    
     const MusicInformation* mi=sound_manager->getCurrentMusic();
     if(!mi) return;
     int y=UserConfigParams::m_height-40;