don't generate result variable when not using postconditions to avoid

don't generate result variable when not using postconditions to avoid

2008-02-04  Juerg Billeter  <j@bitron.ch>

	* vala/valaclass.vala, vala/valainterface.vala, vala/valastruct.vala,
	  gobject/valaccodegeneratormethod.vala: don't generate result
	  variable when not using postconditions to avoid unnecessary name
	  conflicts with method parameters

svn path=/trunk/; revision=963