Update Deflate.cs

[p3p3pp3]

fixed a bug in calculating the size of the pending buffer.
In certain PDF generation scenarios, this bug can lead to the following problems:

System.IndexOutOfRangeException: Index was outside the bounds of the array.
at System.util.zlib.Tree.d_code(Int32 dist)

[yulian-gaponenko]

Hi @p3p3pp3 ,
Thank you for your contribution!

Do you think it would be possible to add a test reproducing the problem? Or perhaps guide us to help reproduce it on our end?

And one more thing, would you mind signing the Contributor License Agreement?
The details are available at https://itextpdf.com/en/how-buy/legal/itext-contributor-license-agreement
We need it in order to be able to merge your PR

[p3p3pp3]

Hi @p3p3pp3 , Thank you for your contribution!

Do you think it would be possible to add a test reproducing the problem? Or perhaps guide us to help reproduce it on our end?

And one more thing, would you mind signing the Contributor License Agreement? The details are available at https://itextpdf.com/en/how-buy/legal/itext-contributor-license-agreement We need it in order to be able to merge your PR

I have a data file that reproduces the issue, an image, but this image is a stamp, I can't upload it to GitHub, that would cause legal trouble. Can you give me an email address? I'll be happy to send you the test code and this file for confirmation.

[avlemos]

@p3p3pp3 , feel free to email me at andre.lemos @ itext pdf . com

[vitali-pr]

I found the file to test on at https://issues.jenkins.io/browse/JENKINS-19473 and reproduced the issue.

But @p3p3pp3 , we still don't see you signed Contributor License Agreement. Could you, please sign it?

[p3p3pp3]

Hi @vitali-pr , I've emailed a signed CLA to dev.intern @ itextpdf.com

[vitali-pr]

@p3p3pp3 , your PR has been merged, see commit 15daf08
The test has been added in commit 7bebec3

Thanks for contributing.