Bugfix: if a streamer was improperly disconnected, the NetworkListenerThread might end up in a dead loop.

Change-Id: I7c9034daa9ae4c06571039f28f160c6ca84c4a6d
Merge pull request #45 from rdumusc/fix_network_listener_deadloop

Bugfix: if a streamer was improperly disconnected, the NetworkListenerTh...