Missing inertia tag on d46.urdf.xacro

[chikuta]

Hi, Thank you for your excellent source code.

I found a missing inertial tag on flir_ptu_description.
There is no inertial tag on ${name}_tilted_link as follow link.

flir_ptu/flir_ptu_description/urdf/d46.urdf.xacro

Lines 77 to 91 in bd9a73e

	<link name="${name}_tilted_link">
	<visual>
	<material name="ptu_body_color">
	<color rgba="0.3 0.3 0.3 1.0" />
	</material>
	<geometry>
	<mesh filename="package://flir_ptu_description/meshes/flir-ptu-camera-mount.stl"/>
	</geometry>
	</visual>
	<collision>
	<geometry>
	<mesh filename="package://flir_ptu_description/meshes/flir-ptu-camera-mount.stl"/>
	</geometry>
	</collision>
	</link>

If someone use gazebo, this model won't work correctly.