Don't use the prefix check when parsing YAML
Don't use the prefix check when parsing YAML

We don't do this for the from_file() version, and we can reliably depend on
libyaml for error checking now.

ximion/appstream-glib,ximion/appstream-glib,ximion/appstream-glib,hughsie/appstream-glib,hughsie/appstream-glib,hughsie/appstream-glib