Issue #401

From: Olzhas Zhumabek (anonymous.from.applecity_at_[hidden])
Date: 2020-01-03 15:22:27

Hi,

I'm self assigning for the problem
https://github.com/boostorg/gil/issues/401. Since this is my first issue, I
would like to check if my plan has any problems.

My plan:
1. Replicate the problem in file gil/test/extension/io/png_read_test.cpp ,
somewhere in the auto tests section, probably at the end.
2. Fix the problem
3. Ensure tests pass
4. PR straight to gil/develop

Best regards,
Olzhas