Fix coverity false positive.
"Non-static class member field "buffer_settings.fragsize" is not initialized in this constructor nor in any functions that it calls."

pa_buffer_attr::fragsize is only ever used for recordings. We only ever use playback here...

Coverity-Id: 746856
Coverity fix

Remove unused private member.
Remove false-positive. channels would have been initialised during the call to putFrames

Coverity-Id: 700822 and 700821
Fix coverity false positive.

m_aeskey is never accessed until m_keyloaded is set in either HLSSegment::CopyAESKey or HLSSegment::DownloadKey, which would see m_aeskey being set

Coverity-Id: 1023900