Memory leak on 0.5.0

[vooon]

I tested mavros_node for a while and found a memory leak (about 300 KiB/min).
This is strange, because i use smart pointers everywhere. But I have little experience in C++.
For current tasks of leakage is not critical, but should be corrected to the next big release.

Test environment:

• ROS Indigo compiled from source for armhf
• Wandboard Quad host machine
• mavros 0.5.0 connected to APM 2.6 via USB at 57600
• ros2ntpd 1.0.0 connected to /mavros/time_reference topic

[vooon]

Testing under valgrind shows errors in log4cxx, but it is very strange.

rosparam set /mavros/plugin_blacklist '["*"]'
rosrun --prefix 'valgrind --leak-check=full --trace-children=yes --show-leak-kinds=all --log-file=mavros.vglog' mavros mavros_node _serial_port:=/tmp/fcu2
rosrun --prefix 'valgrind --leak-check=full --trace-children=yes --show-leak-kinds=all --log-file=ros_udp.vglog' mavros ros_udp _bind_port:=45000
rosrun mavros ros_udp _bind_port:=45001 _gcs_host:=localhost _gcs_port:=45000

Results: mavros.vdlog, ros_udp.vglog.

[vooon]

With --track-origins=yes: mavros.vglog, ros_udp.vglog.

[vooon]

Now leak speed reduced to ~150 KiB/min. Still don't know source.

[vooon]

I think #54 remove this leak. It was in udp code.

[vooon]

Node works about a hour and no new space allocated. I think it's closed.