Music doesn't change after quickloading

[Vladimir Mishonov]

Quickloading (with the F9 key) a savegame made on another map won't change the music - it will only change after opening and closing the main menu (pressing Esc twice). This issue won't happen if the normal "Load Game" menu is used.

Tested with the latest Mercurial build.

[Braden Obrzut]

Fixed in changeset 29d9459.