QSVGRenderer: multiple transform attribute values are not handled correctly

When rendering SVG Elements with multiple transform values ("transform-list" in W3C terms) containing at least one matrix transformation the resulting image is sometimes not correct. It seems that the combination of a matrix transform and other transformations is not handled properly, e.g.

transform="translate(...) matrix(...) scale(...)"

I have attached a small SVG file which shows this behaviour. Also attached is a corresponding PNG image rendered using QSVGRenderer and a PNG image example to show how other programs such as firefox or inkscape render this file.

The origin of the problem seems to be erroneous sequencing of a noncommutative matrix multiplication in parseTransformationMatrix() in qtsvg/qsvghandler.cpp. The attached patch for Qt 5.6.1 fixes this. After applying the patch the provided SVG (as well as other tested SVGs) appear to render fine.