labels on graph sometimes wrong

[tfoote]

This is was discovered in #51 debugging. Some labels on the graph are incorrect. It looks like doxygen is not tracking things correctly.

To see the problem see http://docs.ros.org/indigo/api/rosbag/html/c++/player_8h.html

The image
Has 3 copies of rosbag/macros.h each one linking to different macros.h files. They link correctly but the names on the 2nd and 3rd should be cpp_common and rospack not rosbag.

Currently we believe that this is an issue internal to doxygen.