fold-const.c (fold_binary_op_with_conditional_arg): Only build a COMPOUND_EXPR if 'arg' is really a SAVE_EXPR.

	* fold-const.c (fold_binary_op_with_conditional_arg): Only
	build a COMPOUND_EXPR if 'arg' is really a SAVE_EXPR.

Co-Authored-By: Olivier Hainque <hainque@act-europe.fr>

From-SVN: r76434