re PR rtl-optimization/68287 (conditional jump or move depends on uninitialized value in lra-lives.c:1048)

Fix PR rtl-optimization/68287

	PR rtl-optimization/68287
	* lra-lives.c (lra_create_live_ranges_1): Reserve the right
	number of elements.

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

From-SVN: r230163