re PR tree-optimization/18663 (ACATS ICE cc1221d expected integer_cst, have nop_expr in tree_int_cst_lt, at tree.c:3779)

	PR tree-optimization/18663
	* tree-ssa-dom.c (extract_range_from_cond): Return 0
	if the type has variable bounds.

From-SVN: r95320