[Vala] Segmentation fault at DinEconomi.vala (second gtk+ sample)

[Denis Cheremisov <denis-cheremisov yandex ru>]

I use svn version of vala. Tried to compile gtk+ sample, got segfault.
gdb valac core showed:

> Core was generated by `valac --pkg gtk+-2.0 DinEkonomi.vala -o
> mytestapp'.
> Program terminated with signal 11, Segmentation fault.
> #0  0xb7d6cf3c in vala_code_node_replace_type (self=0x0,
> old_type=0x8f81568, 
>    new_type=0x9140228) at valacodenode.c:99
> 99              VALA_CODE_NODE_GET_CLASS (self)->replace_type (self,
> old_type, new_type);