only commit if we have data

pandora/sequence/tasks.py

@@ -42,7 +42,7 @@ def get_sequences(itemId):
                 v = ', '.join([isinstance(v, basestring) and "'%s'"%v or str(v)
                                for v in sequence.values()])
                 values.append('(%s)'%v)
-
+        if values:
             cursor = connection.cursor()
             sql = "INSERT INTO sequence_sequence (%s) VALUES %s" % (keys, ', '.join(values));
             cursor.execute(sql)