[devel] Check for READ_CHOP_16_TO_8 support in pngvalid,
not libpng version for presence of png_set_chop_16_to_8(), in pngvalid.c
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@ -5297,7 +5297,7 @@ IT(strip_16);
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#undef PT
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#define PT ITSTRUCT(strip_16)
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#if PNG_LIBPNG_VER >= 10504 /* API added in 1.5.4 */
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#ifdef PNG_READ_CHOP_16_TO_8_SUPPORTED /* API added in 1.5.4 */
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/* png_set_chop_16 */
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static void
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image_transform_png_set_chop_16_set(PNG_CONST image_transform *this,
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@ -5349,7 +5349,7 @@ image_transform_png_set_chop_16_add(image_transform *this,
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IT(chop_16);
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#undef PT
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#define PT ITSTRUCT(chop_16)
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#endif /* From libpng 1.5.4 */
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#endif /* PNG_READ_CHOP_16_TO_8_SUPPORTED, from libpng 1.5.4 */
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#endif /* PNG_READ_16_TO_8_SUPPORTED */
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#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED
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