Small clang-tidy fix

[rhaschke]

No description provided.

[codecov]

Codecov Report

Merging #3129 (530afac) into master (bb9a767) will increase coverage by 0.07%.
The diff coverage is 0.00%.

❗ Current head 530afac differs from pull request most recent head f326984. Consider uploading reports for the commit f326984 to get more accurate results

@@            Coverage Diff             @@
##           master    #3129      +/-   ##
==========================================
+ Coverage   61.58%   61.65%   +0.07%     
==========================================
  Files         376      376              
  Lines       33311    33309       -2     
==========================================
+ Hits        20512    20533      +21     
+ Misses      12799    12776      -23     

Impacted Files	Coverage Δ
...llision_detection/src/collision_octomap_filter.cpp	0.00% <0.00%> (ø)
...eit_ros/manipulation/pick_place/src/pick_place.cpp	88.58% <0.00%> (-3.80%)	⬇️
...ipulation/pick_place/src/manipulation_pipeline.cpp	73.56% <0.00%> (-0.82%)	⬇️
...nning_scene_monitor/src/planning_scene_monitor.cpp	66.47% <0.00%> (+0.13%)	⬆️
...raint_samplers/src/default_constraint_samplers.cpp	79.71% <0.00%> (+0.30%)	⬆️
...meterization/work_space/pose_model_state_space.cpp	81.77% <0.00%> (+1.77%)	⬆️
moveit_core/robot_model/src/joint_model_group.cpp	64.15% <0.00%> (+2.28%)	⬆️
...e/src/parameterization/model_based_state_space.cpp	71.43% <0.00%> (+3.11%)	⬆️
.../ompl_interface/src/detail/constrained_sampler.cpp	60.98% <0.00%> (+17.08%)	⬆️

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