Fix for PR java.lang/258:
	* prims.cc (_Jv_PrimClass): Set state of primitive class to
	JV_STATE_DONE, to prevent accidental initialization.
	* java/lang/natClass.cc (_Jv_IsAssignableFrom): Call
	_Jv_InterfaceAssignableFrom if target is an interface and source is
	an interface or an abstract class. Remove redundant initializeClass
	calls. Remove duplicate if_idt test.
	(_Jv_InterfaceAssignableFrom): New function.
	* java/lang/Class.h (_Jv_InterfaceAssignableFrom): Prototype.

From-SVN: r34563