Constant libjxl_sys::JXL_DEC_PREVIEW_IMAGE

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pub const JXL_DEC_PREVIEW_IMAGE: JxlDecoderStatus = 512;

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Informative event by @ref JxlDecoderProcessInput “JxlDecoderProcessInput”: Preview image, a small frame, decoded. This event can only happen if the image has a preview frame encoded. This event occurs max once for the codestream and always later than @ref JXL_DEC_COLOR_ENCODING and before @ref JXL_DEC_FRAME.