Use get_packet_no_wait and a sleep so that if told to close we give u…

…p on getting a packet

src/zm_event.cpp

@@ -686,7 +686,7 @@ void Event::Run() {
  // The idea is to process the queue no matter what so that all packets get processed.
  // We only break if the queue is empty
  while (!terminate_ and !zm_terminate) {
- ZMLockedPacket *packet_lock = packetqueue->get_packet(packetqueue_it);
+ ZMLockedPacket *packet_lock = packetqueue->get_packet_no_wait(packetqueue_it);
  if (packet_lock) {
  std::shared_ptr<ZMPacket> packet = packet_lock->packet_;
  if (!packet->decoded) {
@@ -721,7 +721,8 @@ void Event::Run() {
  // Important not to increment it until after we are done with the packet because clearPackets checks for iterators pointing to it.
  packetqueue->increment_it(packetqueue_it);
  } else {
- return;
+ if (terminate_ or zm_terminate) return;
+ usleep(10000);
  } // end if packet_lock
  } // end while
 } // end Run()