Bug#919504: [kmail] blank page on print preview

[Blum Mathieu <mathieu.blum@free.fr>]

Hi,

I meet the same problem: blank page when printing or printing preview.

By searching on internet, I have found this:
https://github.com/qutebrowser/qutebrowser/issues/4599
Based on that, I have compared source codes of pdfium_document_wrapper_qt 
between from versions 5.11 (https://github.com/qt/qtwebengine/blob/5.11/src/
core/printing/pdfium_document_wrapper_qt.cpp) and 5.12 (https://github.com/qt/
qtwebengine/blob/5.12/src/core/printing/pdfium_document_wrapper_qt.cpp).
And there are some modifications mainly in the function "QImage createImage".

Could this be the cause ? Maybe can somebody do the test.

Mathieu