Fix crash when calling setPose service on static and nolink entity #73

Job	Run time
test / matrix-prep-os	3s
test / matrix-prep-bazelversion	8s
test / test (ubuntu-latest, 8.0.0, ., true)	50m 5s
test / test (ubuntu-latest, 7.3.1, ., true)	51m 9s
	1h 41m 25s

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