A weapon's charging loop still on a channel as a network game ended
("still counted as playing ... let go", sound_cache_close) was finished
by the next map's sound_render against the next map's sound cache, which
halted the game as the next network game loaded (data.c: xbox sound index
is unused or changed). sound_dispose_from_old_map stops every channel
still holding a permutation, so its count is given back while the map's
sounds are there.
(cherry picked from commit 8e5b3f9f23beb9f015a0caf487caa82ada16c73e)
Milenko
88eb3e3c73