queue/Queue: MoveOrder() returns to_order

src/queue/Playlist.cxx

@@ -310,8 +310,7 @@ playlist::SetRandom(PlayerControl &pc, bool status)
 			   playlist is played after that */
 			unsigned current_order =
 				queue.PositionToOrder(current_position);
-			queue.MoveOrder(current_order, 0);
-			current = 0;
+			current = queue.MoveOrder(current_order, 0);
 		} else
 			current = -1;
 	} else

src/queue/Queue.cxx

@@ -195,7 +195,7 @@ Queue::MoveRange(unsigned start, unsigned end, unsigned to) noexcept
 	}
 }
 
-void
+unsigned
 Queue::MoveOrder(unsigned from_order, unsigned to_order) noexcept
 {
 	assert(from_order < length);
@@ -212,6 +212,7 @@ Queue::MoveOrder(unsigned from_order, unsigned to_order) noexcept
 	}
 
 	order[to_order] = from_position;
+	return to_order;
 }
 
 void

src/queue/Queue.hxx

@@ -284,8 +284,10 @@ struct Queue {
 
 	/**
 	 * Moves a song to a new position in the "order" list.
+	 *
+	 * @return to_order
 	 */
-	void MoveOrder(unsigned from_order, unsigned to_order) noexcept;
+	unsigned MoveOrder(unsigned from_order, unsigned to_order) noexcept;
 
 	/**
 	 * Moves a song to a new position.