re PR c/3325 (cast of bit-field to same type gets discarded)

re PR c/3325 (cast of bit-field to same type gets discarded)

	PR c/3325
	* c-decl.c (enum_decl_context): Remove BITFIELD.
	(grokdeclarator): Take bitfield width as an input.
	Ensure bitfields are given the correct type.  Perform
	bitfield width validation with build_bitfield_integer_type
	rather than waiting for finish_struct.
	(grok_typename, grok_typename_in_parm_context, start_decl,
	push_parmdecl, grokfield, start_function): Update calls to
	grokdeclarator.
	(build_bitfield_integer_type): New function.
	(finish_struct): Move bitfield validation to grokdeclarator
	and build_bitfield_integer_type.
	* tree.c (build_nonstandard_integer_type): New function.
	* tree.h (build_nonstandard_integer_type): New prototype.
objc:
	* objc-act.c (objc_copy_list): Remove DECL_INITIAL kludge.
testsuite:
	* gcc.c-torture/compile/20000224-1.c: Update.
	* gcc.c-torture/execute/bitfld-1.c: New tests.
	* gcc.dg/bitfld-1.c, bitfld-2.c: Diagnostic tests.
	* gcc.dg/uninit-A.c: Update.

From-SVN: r49321