Separate bitfields set by starpu from bitfields set by user, since the latter are accessed unsafely by starpu, but the former shouldn't

include/starpu_task.h

@@ -166,12 +166,12 @@ struct starpu_task
 	unsigned destroy:1;
 	unsigned regenerate:1;
 
+	unsigned workerid;
+
 	unsigned scheduled:1;
 
 	unsigned int mf_skip:1;
 
-	unsigned workerid;
-
 	int priority;
 
 	enum starpu_task_status status;