check len instead of if nil #17789

Job	Run time
appimage-ignore-tests	0s
appimage-ignore-tests	0s
static-ignore-tests	0s
static-ignore-tests	0s
test / Test meta.json jsonschema	19s
test / Test meta.json jsonschema	19s
test / linux-amd64 Go Unit Tests	14m 56s
test / linux-amd64 Go Unit Tests	14m 56s
test / linux-arm64 Go Unit Tests	16m 3s
test / linux-arm64 Go Unit Tests	16m 3s
test / Go 32-bit Unit Tests	11m 13s
test / Go 32-bit Unit Tests	11m 13s
license_finder / Audit 3rd-Party Licenses	1m 14s
license_finder / Audit 3rd-Party Licenses	1m 14s
macos / build	6m 44s
macos / build	6m 44s
test / Test Longer-running Motion Plans if affected / Check files	6s
test / Test Longer-running Motion Plans if affected / Check files	6s
test / Test Longer-running Motion Plans if affected / Motion Extended Tests	4m 23s
test / Test Longer-running Motion Plans if affected / Motion Extended Tests	4m 5s
test / All Tests Passing	1s
test / All Tests Passing	1s
droid	0s
static	0s
static	0s
appimage	0s
appimage	0s
droid / droid-build	0s
	1h 49m 40s

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