c-typeck.c (struct constructor_stack): Add range_stack member.

c-typeck.c (struct constructor_stack): Add range_stack member.

	* c-typeck.c (struct constructor_stack): Add range_stack member.
	(really_start_incremental_init): Clear it.
	(push_init_level): Save constructor_range_stack and clear it if
	pushing explicit braces.
	(pop_init_level): abort if constructor_range_stack is non-zero at
	explicit closing brace.  Restore saved constructor_range_stack if
	not implicit.

	* gcc.dg/gnu99-init-1.c: Add 3 more designated range initializer
	tests.

From-SVN: r39302