* @param irn The node to be checked for lowering
* @param walk_env The walker environment
*/
-static void lower_nodes_before_sched_walker(ir_node *irn, const void *walk_env) {
+static void lower_nodes_before_sched_walker(ir_node *irn, void *walk_env) {
const arch_env_t *arch_env = walk_env;
if (!is_Block(irn) && !is_Proj(irn)) {