fix bug of rt_memheap_detach
@@ -127,7 +127,7 @@ rt_err_t rt_memheap_detach(struct rt_memheap *heap)
RT_ASSERT(rt_object_get_type(&heap->parent) == RT_Object_Class_MemHeap);
RT_ASSERT(rt_object_is_systemobject(&heap->parent));
- rt_object_detach(&(heap->lock.parent.parent));
+ rt_sem_detach(&heap->lock);
rt_object_detach(&(heap->parent));
/* Return a successful completion. */
