qt: Build fails on Ubuntu 18.04: 'size' was not declared in this scope

Currently trying to build the master branch. However, the compilation stops with the following: meson-log.txt

...
../subprojects/gst-plugins-good/ext/qt/qtitem.cc: In member function ‘void QtGLVideoItem::fitStreamToAllocatedSize(GstVideoRectangle*)’:
../subprojects/gst-plugins-good/ext/qt/qtitem.cc:332:13: error: ‘size’ was not declared in this scope
     dst.w = size().width();
             ^~~~
../subprojects/gst-plugins-good/ext/qt/qtitem.cc:332:13: note: suggested alternative: ‘gsize’
     dst.w = size().width();
             ^~~~
             gsize
../subprojects/gst-plugins-good/ext/qt/qtitem.cc:339:17: error: ‘size’ was not declared in this scope
     result->w = size().width();
                 ^~~~
../subprojects/gst-plugins-good/ext/qt/qtitem.cc:339:17: note: suggested alternative: ‘gsize’
     result->w = size().width();
                 ^~~~
                 gsize
[2292/4257] Compiling C++ object subprojects/gst-plugins-good/ext/qt/libgstqmlgl.so.p/qtglrenderer.cc.o
ninja: build stopped: subcommand failed.

Also attached a meson-log.txt; Hope that will help.