cleanup: s/< 1/== 0/ for clarity.

ir/be/bespillutil.c

@@ -1175,7 +1175,7 @@ void be_spill_prepare_for_constraints(ir_graph *irg)
 		/* Could be that not all CopyKeeps are really needed, */
 		/* so we transform unnecessary ones into Keeps.       */
 		foreach_ir_nodeset(&entry->copies, cp, iter) {
-			if (be_is_CopyKeep(cp) && get_irn_n_edges(cp) < 1) {
+			if (be_is_CopyKeep(cp) && get_irn_n_edges(cp) == 0) {
 				int      arity = get_irn_arity(cp);
 				ir_node *block = get_nodes_block(cp);
 				ir_node *keep  = be_new_Keep(block, arity, get_irn_in(cp));