Only read a maximum of 100 bytes at a time in IMT header #6623
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Fixes
Pillow/src/PIL/ImtImagePlugin.py
Line 66 in aa8877a
by only reading a maximum of 100 bytes at a time.
When I looked for tests to confirm that this fix didn't break anything, I didn't find any dedicated tests. So I reverse-engineered an image file from ImtImagePlugin and added tests.