KDTree error in stow task

[pazeshun]

When I tested stow task with #2155 , I got the following error in baxter.launch after I launched stow.launch

[pcl::KdTreeFLANN::setInputCloud] Cannot create a KDTree with an empty input cloud!

This error continued until I killed stow.launch
But the robot performed recognition and picking well.

[knorth55]

This error occurs when there is no pointcloud input.
This is because we use attention clipper.
When camera look inside tote, the error doesnt happen.
I think it is not a big problem.

[pazeshun]

I understand. Thanks!

[knorth55]

I think this PR jsk-ros-pkg/jsk_recognition#2120 suppresses this error output.
We need to check with real robot.