fix all test failures except for 8

[sadguitarius]

Here's the fix for local_alsa_multi_listener. I just changed the one statement and this should fix most of the errors. I found a couple of other compiler errors when I tried doing a clang build but I don't think they're screwing up the tests. The fixes for those are not included here but I can submit another PR once this is sorted out.

[sadguitarius]

I'm still getting test 8 failing on void test_client_try_several_connections and a segfault on test 7. The segfault goes away when I build with clang. I'm pretty certain this has nothing to do with the alsa additions, but I do see that test 8 is failing on the master branch now. I'd have to look more closely at what the test is doing.