build error about "dynamixel_msgs"

[kenichi-ohara]

To build the master code, I met error about "dynamixel_msgs" in line 51, nuitrack_body_tracker_node.cpp.
I think this message has not been used in current version.

To solve this problem, the line 51 is commented out as simple solution.
As other solution, to correctly build current version, we should add the dependencies about "dynamixel_msgs" to CMakeLists.txt and package.xml.
Which is right solution?