Fix #3678

Don't play drive-on sound from materials when the game state is paused.

src/audio/sfx_manager.cpp

@@ -519,7 +519,7 @@ void SFXManager::toggleSound(const bool on)
             resume_later = (World::getWorld()->getPhase() == World::IN_GAME_MENU_PHASE);
         for (int n=0; n<sfx_amount; n++)
         {
-            // This also pauses sound effects
+            // This also pauses sound effects if they should be resumed later
             m_all_sfx.getData()[n]->onSoundEnabledBack(resume_later);
         }
         m_all_sfx.unlock();

src/karts/kart.cpp

@@ -2003,7 +2003,8 @@ void Kart::handleMaterialSFX()
 
     bool m_schedule_pause = m_flying ||
                         dynamic_cast<RescueAnimation*>(getKartAnimation()) ||
-                        dynamic_cast<ExplosionAnimation*>(getKartAnimation());
+                        dynamic_cast<ExplosionAnimation*>(getKartAnimation()) ||
+                        World::getWorld()->getPhase() == World::IN_GAME_MENU_PHASE;
 
     // terrain sound is not necessarily a looping sound so check its status before
     // setting its speed, to avoid 'ressuscitating' sounds that had already stopped