add more non-null warnings

add more non-null warnings

2008-02-01  Juerg Billeter  <j@bitron.ch>

	* vala/parser.y, vala/valaarraytype.vala, vala/valadatatype.vala,
	  vala/valaintegertype.vala, vala/valanulltype.vala,
	  vala/valapointertype.vala, vala/valasemanticanalyzer.vala,
	  vala/valasymbolresolver.vala, vala/valaunresolvedtype.vala,
	  ccode/valaccodeassignment.vala, ccode/valaccodebinaryexpression.vala,
	  gobject/valaccodegenerator.vala: add more non-null warnings

svn path=/trunk/; revision=940