Clippy fixes #937

Job	Run time
test_toolchains (1.61.0)	31s
test_toolchains (nightly)	1m 50s
test_toolchains (beta)	2m 25s
test_avif	1m 53s
build_benchmarks	1m 9s
Fuzz targets (cargo-fuzz)	9m 37s
Fuzz targets (afl)	2m 6s
cargo-deny	35s
clippy	4m 8s
public_private_dependencies	27s
rustfmt	24s
test_avif_decoding	3m 43s
test_big_endian	1m 3s
test_big_endian (default)	4m 31s
test_big_endian (webp)	1m 10s
test_big_endian (webp-encoder)	3m 6s
verify_msrv	2m 25s
test_features	33s
test_features (default)	2m 22s
test_features (gif)	43s
test_features (jpeg)	49s
test_features (png)	42s
test_features (tiff)	1m 4s
test_features (ico)	43s
test_features (pnm)	33s
test_features (tga)	35s
test_features (webp)	36s
test_features (bmp)	56s
test_features (hdr)	41s
test_features (dxt)	46s
test_features (dds)	44s
test_features (farbfeld)	37s
test_features (openexr)	1m 32s
test_features (jpeg_rayon)	51s
test_features (webp-encoder)	1m 10s
	57m 0s

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