2007-09-01  Juerg Billeter  <j@bitron.ch>

	* vala/valaclass.vala, vala/valadatatype.vala, vala/valainterface.vala,
	  vala/valasemanticanalyzer.vala, gobject/valacodegenerator.vala,
	  gobject/valacodegeneratorassignment.vala: let DataType.is_subtype_of
	  return true if the specified type is the same

svn path=/trunk/; revision=564