audiohook: Unlock channel in mute if no audiohooks present.
In the case where mute was called on a channel that had no audiohooks the code was not unlocking the channel, resulting in a deadlock. Resolves: #233
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@ -1385,6 +1385,7 @@ int ast_audiohook_set_mute_all(struct ast_channel *chan, const char *source, enu
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ast_channel_lock(chan);
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if (!ast_channel_audiohooks(chan)) {
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ast_channel_unlock(chan);
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return -1;
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}
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