Fixed certain pngs not being transparent when they should be. - #2521

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4, actions/setup-dotnet@v4, github/codeql-action/analyze@v3, github/codeql-action/init@v3. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Cannot convert null literal to non-nullable reference type.

Field 'PdfCIDFont.DW2' is never assigned to, and will always have its default value null

The field 'PdfCIDFont.W' is never used

Field 'PdfCIDFont.W2' is never assigned to, and will always have its default value null

The field 'FontsBinaryReader._numberOfReadBytes' is assigned but its value is never used

The result of the expression is always 'false' since a value of type 'int' is never equal to 'null' of type 'int?'

The annotation for nullable reference types should only be used in code within a '#nullable' annotations context.

The field 'FontsBinaryReader._numberOfReadBytes' is assigned but its value is never used

The result of the expression is always 'false' since a value of type 'int' is never equal to 'null' of type 'int?'

The annotation for nullable reference types should only be used in code within a '#nullable' annotations context.

Cannot build an overlay database because build-mode is set to "undefined" instead of "none". Falling back to creating a normal full database instead.