re PR c/60257 (Incorrect column number and confusing message in -Woverride-init)

re PR c/60257 (Incorrect column number and confusing message in -Woverride-init)

	PR c/60257
	* c-typeck.c (warning_init): Add location_t parameter.  Call
	warning_at instead of warning.
	(push_init_level): Pass input_location to warning_init.
	(add_pending_init): Add location_t parameter.  Pass loc to
	warning_init.
	(set_nonincremental_init): Pass input_location to add_pending_init.
	(set_nonincremental_init_from_string): Likewise.
	(output_init_element): Pass loc to warning_init and to
	add_pending_init.

	* gcc.dg/pr60257.c: New test.

From-SVN: r209974