Initialize amActive for SubtitlesFinder

sickbeard/subtitles.py

@@ -123,6 +123,8 @@ class SubtitlesFinder():
     The SubtitlesFinder will be executed every hour but will not necessarly search
     and download subtitles. Only if the defined rule is true
     """
+    def __init__(self):
+        self.amActive = False
 
     def run(self, force=False):