Fix clippy issue #1019

Job	Run time
test_avif	1m 56s
test_features	51s
build_benchmarks	1m 18s
Fuzz targets (afl)	1m 49s
test_features (default)	2m 8s
Fuzz targets (cargo-fuzz)	6m 36s
test_features (gif)	1m 0s
cargo-deny	28s
test_features (jpeg)	1m 0s
clippy	3m 20s
public_private_dependencies	23s
test_features (png)	57s
rustfmt	5s
test_avif_decoding	1m 51s
test_features (tiff)	1m 10s
test_big_endian	1m 2s
test_features (ico)	1m 1s
test_big_endian (default)	2m 45s
test_toolchains (1.61.0)	9m 47s
test_features (pnm)	1m 2s
verify_msrv	4m 36s
test_big_endian (webp)	1m 12s
test_toolchains (nightly)	3m 6s
test_features (tga)	57s
test_big_endian (webp-encoder)	2m 24s
test_toolchains (beta)	2m 47s
test_features (webp)	1m 0s
test_features (bmp)	1m 5s
test_features (hdr)	46s
test_features (dxt)	58s
test_features (dds)	1m 6s
test_features (farbfeld)	57s
test_features (openexr)	1m 20s
test_features (jpeg_rayon)	1m 9s
test_features (webp-encoder)	1m 33s
	1h 5m 25s

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