Remove link to CIA from README

cia.navi.cx/stats/project/polypaudio does not exist anymore,
see http://cia.vc/

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Cleanup !! for bool

!!x makes no sense if x is bool (this is a leftover from the
convertion pa_bool_t -> bool, d806b197)

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
mainloop: Fix typo

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
modules: Fix )== typos

add a space between ) and ==

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
alsa-sink: Check for after-avail is redundant

after-avail is always false at this point

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
tests: Make global variables static in srbchannel-test

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
tests: Be careful with data types to avoid cast

use unsigned and size_t for counters and packet length, resp.

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>