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Document default of *crc-fail-behaviour.

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commit 85d3c5e3f19da51b5b14e83123af79c778ddba73 1 parent 6caaaf7
@Ramarren authored
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  1. +1 −1  README
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2  README
@@ -8,7 +8,7 @@ boolean to indicate if CRC was successful, which most interesting property i
(grayscale) or three dimensional array containing image data. Other properties are width, height,
bit-depth and colour-type. If file was loaded by read-png-file slot png-file contains pathname used.
-Dynamic variable *crc-fail-behaviour* can be set to one of :error, :warn or :no-action, and controls what happens on checksum failure. Error signalled is of type png-read:crc-failure, and restart png-read:ignore-crc-failure is established.
+Dynamic variable *crc-fail-behaviour* can be set to one of :error, :warn or :no-action (default is :error), and controls what happens on checksum failure. Error signalled is of type png-read:crc-failure, and restart png-read:ignore-crc-failure is established.
For indexed images slot index-data contains an array with indices in pallete (stored in pallete
slot), and image-data contains decoded colors.
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