Fixed the problem of Animated PNGs being decoded incorrectly #1581

Job	Run time
cargo-deny	21s
Fuzz targets (afl)	3m 10s
build_benchmarks	47s
Fuzz targets (cargo-fuzz)	1m 2s
cargo-semver-checks	22s
clippy	2m 6s
public_private_dependencies	26s
rustfmt	7s
test_avif_decoding	1m 13s
test_other_archs (powerpc-unknown-linux-gnu)	2m 23s
test_toolchains (1.67.1)	38s
test_features	18s
test_toolchains (nightly)	1m 44s
test_features (default)	1m 38s
test_other_archs (i686-unknown-linux-gnu)	1m 32s
test_toolchains (beta)	1m 31s
test_features (rayon)	24s
test_features (avif)	57s
test_features (bmp)	20s
test_features (dds)	42s
test_features (exr)	4m 40s
test_features (ff)	27s
test_features (gif)	20s
test_features (hdr)	21s
test_features (ico)	38s
test_features (jpeg)	35s
test_features (png)	32s
test_features (pnm)	25s
test_features (qoi)	55s
test_features (tga)	18s
test_features (tiff)	24s
test_features (webp)	19s
	31m 35s

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