PR middle-end/79399
	* ira-int.h (struct target_ira_int): Change x_max_struct_costs_size
	type from int to size_t.
	* ira-costs.c (struct_costs_size): Change type from int to size_t.

Co-Authored-By: Richard Biener <rguenther@suse.de>

From-SVN: r245256