Move name_cache lock to fix error of list modified during iteration

sickbeard/name_cache.py

@@ -30,6 +30,7 @@ def addNameToCache(name, indexer_id=0):
     name: The show name to cache
     indexer_id: the TVDB and TVRAGE id that this show should be cached with (can be None/0 for unknown)
     """
+
     global nameCache
 
     cacheDB = db.DBConnection('cache.db')
@@ -82,7 +83,7 @@ def saveNameCacheToDb():
 
 def buildNameCache(show=None):
     global nameCache
-
+    with nameCacheLock:
         sickbeard.scene_exceptions.retrieve_exceptions()
 
         if not show:
@@ -90,12 +91,10 @@ def buildNameCache(show=None):
             for show in sickbeard.showList:
                 buildNameCache(show)
         else:
-        with nameCacheLock:
             logger.log(u"Building internal name cache for " + show.name, logger.INFO)
             clearCache(show.indexerid)
             for curSeason in [-1] + sickbeard.scene_exceptions.get_scene_seasons(show.indexerid):
-                for name in list(set(sickbeard.scene_exceptions.get_scene_exceptions(show.indexerid, season=curSeason) + [
-                    show.name])):
+                for name in list(set(sickbeard.scene_exceptions.get_scene_exceptions(show.indexerid, season=curSeason) + [show.name])):
                     name = sickbeard.helpers.full_sanitizeSceneName(name)
                     if name in nameCache:
                         continue