2008-04-14  Juerg Billeter  <j@bitron.ch>

	* vala/valaclass.vala, vala/valainterface.vala,
	  vala/valatypesymbol.vala, vala/valavaluetype.vala,
	  gobject/valaccodegenerator.vala: prepare support for nullable and
	  boxed value types

svn path=/trunk/; revision=1222