fixed 'args' beiing provided as list for dict.get() method

before the people cache was never used, because the 'args' parameter in
the 'self._people_cache.get(args)' call was a list/tuple object; but the
people cache dictionary has only strings as keys
-> so there were always database queries for the persons which slowed
down the sync process


also renamed 'args' to 'name', because basically a person gets searched
only by its name (see queries.py)

jellyfin_kodi/objects/kodi/kodi.py

@@ -160,22 +160,23 @@ class Kodi(object):
         self.cursor.execute(QU.add_person, args)
         return self.cursor.lastrowid
 
-    def _get_person(self, *args):
+    def _get_person(self, name):
         '''Retrieve person from the database, or add them if they don't exist
         '''
-        resp = self.cursor.execute(QU.get_person, args).fetchone()
+        resp = self.cursor.execute(QU.get_person, (name,)).fetchone()
         if resp is not None:
             return resp[0]
         else:
-            return self.add_person(*args)
+            return self.add_person(name)
 
-    def get_person(self, *args):
+    def get_person(self, name):
         '''Retrieve person from cache, else forward to db query
         '''
-        person_id = self._people_cache.get(args)
-        if not person_id:
-            person_id = self._get_person(*args)
-            self._people_cache[args] = person_id
+        if name in self._people_cache:
+            return self._people_cache[name]
+        else:
+            person_id = self._get_person(name)
+            self._people_cache[name] = person_id
             return person_id
 
     def add_genres(self, genres, *args):