QGlib: Update gen.cpp for GError wrapping
QGlib: Update gen.cpp for GError wrapping

dejunk/gstreamer,knuesel/qt-gstreamer,GStreamer/qt-gstreamer,dejunk/gstreamer,ylatuya/qt-gstreamer,detrout/qt-gstreamer,iperry/qt-gstreamer,comicfans/libqtgstreamer,nasserGanjali/QtGStreamer,tswindell/qt-gstreamer,comicfans/libqtgstreamer,ylatuya/qt-gstreamer,GStreamer/qt-gstreamer,iperry/qt-gstreamer,dejunk/gstreamer,freedesktop-unofficial-mirror/gstreamer__qt-gstreamer,freedesktop-unofficial-mirror/gstreamer__qt-gstreamer,knuesel/qt-gstreamer,tswindell/qt-gstreamer,nasserGanjali/QtGStreamer,detrout/qt-gstreamer,ylatuya/qt-gstreamer,detrout/qt-gstreamer,tswindell/qt-gstreamer,iperry/qt-gstreamer,nasserGanjali/QtGStreamer,freedesktop-unofficial-mirror/gstreamer__qt-gstreamer,comicfans/libqtgstreamer,knuesel/qt-gstreamer,GStreamer/qt-gstreamer