2009-01-16  Jürg Billeter  <j@bitron.ch>

	* vala/valabaseaccess.vala:
	* vala/valacodewriter.vala:
	* vala/valagenieparser.vala:
	* vala/valaparser.vala:
	* vala/valasemanticanalyzer.vala:
	* vala/valastruct.vala:
	* vala/valasymbolresolver.vala:
	* vapigen/valagirparser.vala:

	Do not allow structs to have more than one base type and detect
	cycles, patch by Andreas Brauchli, fixes bug 556063 and bug 567661

svn path=/trunk/; revision=2361