Fix integer literal for size_t (backport #1986)

[christophfroehlich]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.65%. Comparing base (1a4e19a) to head (35ae018).
⚠️ Report is 2 commits behind head on jazzy.

Additional details and impacted files

@@           Coverage Diff           @@
##            jazzy    #1987   +/-   ##
=======================================
  Coverage   84.65%   84.65%           
=======================================
  Files         138      138           
  Lines       13408    13408           
  Branches     1199     1199           
=======================================
  Hits        11350    11350           
  Misses       1645     1645           
  Partials      413      413           

Flag	Coverage Δ
unittests	84.65% <ø> (ø)

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Files with missing lines	Coverage Δ
gpio_controllers/src/gpio_command_controller.cpp	83.51% <ø> (ø)
..._broadcaster/test/test_joint_state_broadcaster.cpp	96.93% <ø> (ø)
...include/joint_trajectory_controller/tolerances.hpp	79.79% <ø> (ø)
...ory_controller/src/joint_trajectory_controller.cpp	82.89% <ø> (ø)

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