warning instead of error for invalid icc

[mertalev]

Description

Some JPEG images in the wild have invalid ICC profiles despite being otherwise valid images. See this issue for an example of a phone that systematically produces such images. As these images can be decoded without issue, simply emitting a warning and ignoring the ICC profile is a better behavior than crashing.

Tested with this sample image and confirmed that it was processed successfully with this change, but failed without it.

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[mertalev]

Is there anything I need to do about the failing checks? They don't seem related to the PR.