don't expose private classes in public header files

don't expose private classes in public header files

2007-07-25  Juerg Billeter  <j@bitron.ch>

	* gobject/valacodegenerator.vala, gobject/valacodegeneratorclass.vala,
	  gobject/valacodegeneratormethod.vala,
	  gobject/valacodegeneratorstruct.vala: don't expose private classes in
	  public header files

svn path=/trunk/; revision=386