Add missing CHECK_TYPEDEF calls to recent vptr_{fieldno,basetype} cleanup.

Add missing CHECK_TYPEDEF calls to recent vptr_{fieldno,basetype} cleanup.

gdb/ChangeLog:

	* gdbtypes.c (internal_type_vptr_fieldno): Add missing call to
	CHECK_TYPEDEF.
	(set_type_vptr_fieldno): Ditto.
	(internal_type_vptr_basetype, set_type_vptr_basetype): Ditto.
	* gnu-v3-abi.c (gnuv3_dynamic_class): Ditto.

gdb/testsuite/ChangeLog:

	* gdb.cp/class2.cc (Dbase, D): New classes.
	(main): New local delta.
	* gdb.cp/class2.exp: Test printing delta.
	* gdb.cp/classes.cc (DynamicBase2, DynamicBar): New classes.
	(dynbar): New global.
	* gdb.cp/classes.exp (test_ptype_class_objects): Test ptype DynamicBar.