Fix FutureWarning

resources/lib/entrypoint.py

@@ -483,7 +483,7 @@ def extras(plex_id):
         xbmcplugin.endOfDirectory(int(sys.argv[1]))
         return
     extras = API(xml[0]).extras()
-    if not extras:
+    if extras is None:
         return
     for child in xml:
         xml.remove(child)

resources/lib/plex_api/base.py

@@ -561,7 +561,7 @@ class Base(object):
         Returns None if no extras are found
         """
         extras = self.xml.find('Extras')
-        if not extras:
+        if extras is None:
             return
         return (x for x in extras)