Fix Show.season(0) not returning 'Specials'

Author: gabriel-stackhouse

plexapi/video.py

@@ -333,7 +333,7 @@ def season(self, title=None):
                 title (str or int): Title or Number of the season to return.
         """
         if isinstance(title, int):
-            title = 'Season %s' % title
+            title = 'Season %s' % title if title != 0 else 'Specials'
         key = '/library/metadata/%s/children' % self.ratingKey
         return self.fetchItem(key, etag='Directory', title__iexact=title)