Fix clippy issue #1091

Job	Run time
cargo-deny	28s
Fuzz targets (cargo-fuzz)	4m 11s
build_benchmarks	44s
Fuzz targets (afl)	1m 24s
clippy	2m 22s
public_private_dependencies	23s
rustfmt	15s
test_avif	1m 16s
test_avif_decoding	1m 47s
test_big_endian	52s
test_features	30s
test_big_endian (default)	2m 12s
test_toolchains (1.61.0)	54s
test_features (default)	1m 18s
verify_msrv	54s
test_big_endian (webp)	1m 19s
test_toolchains (nightly)	1m 51s
test_features (gif)	39s
test_big_endian (webp-encoder)	2m 6s
test_toolchains (beta)	1m 39s
test_features (jpeg)	41s
test_features (png)	44s
test_features (tiff)	43s
test_features (ico)	41s
test_features (pnm)	34s
test_features (tga)	37s
test_features (webp)	48s
test_features (bmp)	35s
test_features (hdr)	33s
test_features (dxt)	41s
test_features (dds)	33s
test_features (farbfeld)	36s
test_features (openexr)	53s
test_features (jpeg_rayon)	46s
test_features (webp-encoder)	58s
	37m 27s

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