re PR tree-optimization/82977 (AddressSanitizer: heap-use-after-free in strlen_optimize_stmt .././../gcc/tree-ssa-strlen.c:2971)

	PR tree-optimization/82977
	* tree-ssa-strlen.c (strlen_optimize_stmt): Pass a reference to a copy
	constructed temporary to strlen_to_stridx.put.

From-SVN: r254757