glib-sharp will only get a new release with the new API that we need for
3.0 in a year or something. Instead of waiting a year before we can release
something we now have our own internal copy of glib-sharp trunk that will
be dropped once glib-sharp 3.0 is released.
Everything is now compilable and working without any additional patches.
Make sure that we a) don't free structures of caps as we don't own them
and b) make sure to create a copy of all still referenced structures
before it gets removed, the caps are unreffed or something else happens.
This still needs to be fixed for gst_caps_do_simplify()!
This workaround is inspired by the one in gst-python.
