* Ensure UBSan exits with a non-zero code on error
* Avoid misaligned member access in mosaic_fuzzer
* Add missing VIPS_CLIP in scRGB2sRGB/scRGB2BW
* Fix UBSan error in flatten
By using saturated casts for the int types (copied from vips_cast).
* CI: ensure fuzzer log is printed on error
* Avoid UB in heifload
* Revert flatten change
I could no longer reproduce this with clang 12 locally.
* Indentation fixes [skip ci]
Many codecs can take a huge amount of time attempting to read large
random objects. jpeg_read_header(), for example, can take ~10s on a 1mb
of random data.
Ignore fuzz objects over 100kb.
See https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=24383
