PR c++/87921 - wrong error with inline static data member.

PR c++/87921 - wrong error with inline static data member.

c_parse_final_cleanups checks DECL_IN_AGGR_P to avoid trying to emit a
static data member that has not been defined.  The inline variable patch
changed that to exempt inline variables.  But in this case we haven't
instantiated the variable yet, so we really don't have a definition.  This
patch changes inline variable handling such that DECL_IN_AGGR_P is not set
for a defined inline variable, so we can remove all the checks of
DECL_INLINE_VAR_P after DECL_IN_AGGR_P.

With that change we were failing on a static data member that had been
instantiated due to a use before we got around to processing it in
instantiate_class_template; we should detect that and avoid all the
finish_static_data_member_decl processing, which assumes that it is the
first time we're seeing the variable.

	* decl2.c (finish_static_data_member_decl): Don't set DECL_IN_AGGR_P
	for a non-template inline variable.  Do nothing for an
	already-instantiated variable.
	(c_parse_final_cleanups): Check DECL_IN_AGGR_P without
	DECL_INLINE_VAR_P.
	* decl.c (check_initializer): Likewise.
	(make_rtl_for_nonlocal_decl): Likewise.
	* pt.c (instantiate_decl): Likewise.
	* typeck2.c (store_init_value): Likewise.

From-SVN: r269064