Fix scheduler steal policy

Set scheduler steal policy from engine policy.

Solves #347 (closed).

src/engine.c

@@ -4483,7 +4483,7 @@ void engine_init(struct engine *e, struct space *s,
 
   /* Init the scheduler with enough tasks for the initial sorting tasks. */
   const int nr_tasks = 2 * s->tot_cells + 2 * e->nr_threads;
-  scheduler_init(&e->sched, e->s, nr_tasks, nr_queues, scheduler_flag_steal,
+  scheduler_init(&e->sched, e->s, nr_tasks, nr_queues, (policy & scheduler_flag_steal),
                  e->nodeID, &e->threadpool);
 
   /* Allocate and init the threads. */