curds: Make sure PlaylistNode ids are still mapped after a reset

This is mostly in case the node map gets cleared at some point during
testing.

Signed-off-by: Anna Schumaker <Anna@NoWheyCreamery.com>

curds/playlist/node.py

@@ -96,6 +96,7 @@ class PlaylistNode:
         return None
 
     def reset(self):
+        nodes[id(self)] = self
         for child in self.children:
             del nodes[id(child)]
         self.children.clear()

curds/playlist/playlist.py

@@ -76,6 +76,7 @@ class Playlist(node.PlaylistNode):
         return res
 
     def reset(self):
+        node.PlaylistNode.reset(self)
         self.list.clear()
         self.current = -1
         self.loop    = False