2007-07-11  Juerg Billeter  <j@bitron.ch>

	* ccode/valaccodefunctioncall.vala, gobject/valacodegenerator.vala,
	  gobject/valacodegeneratorinvocationexpression.vala,
	  vapi/glib-2.0.vala: add substring method to the string type
	* tests/test-021.vala, tests/test-021.out: test substring method

	Fixes bug 443524

svn path=/trunk/; revision=347