[Vala] gtk+-2.0 vapi

[Maciej Rumianowski <maciej rumianowski gmail com>]

Hi,

I think it might a bug:
valadoc says about methods http://valadoc.org/gtk
+-2.0/Gtk.TextIter.begins_tag.html and http://valadoc.org/gtk
+-2.0/Gtk.TextIter.ends_tag.html that their behavior is different when
parameter is null. But vapi doesn't allow nulls.

Cheers,
Maciek