add following methods   Mixer::Music#destroy   Mixer::Wave#destroy
add following methods
  Mixer::Music#destroy
  Mixer::Wave#destroy

cyndis/rubysdl,ohai/rubysdl,cyndis/rubysdl,ohai/rubysdl,cyndis/rubysdl,ohai/rubysdl,ohai/rubysdl,cyndis/rubysdl