Fix 'NoneType' object has no attribute 'whitelist

There should have always been a check if the show was anime here.  As
only anime had white and blacklists.  Added both check for is_anime and
that release_groups is not none

sickbeard/show_name_helpers.py

@@ -200,6 +200,8 @@ def makeSceneSeasonSearchString(show, ep_obj, extraSearchType=None):
             # for providers that don't allow multiple searches in one request we only search for Sxx style stuff
             else:
                 for cur_season in seasonStrings:
+                    if ep_obj.show.is_anime:
+                        if ep_obj.show.release_groups is not None:
                             if len(show.release_groups.whitelist) > 0:
                                 for keyword in show.release_groups.whitelist:
                                     toReturn.append(keyword + '.' + curShow+ "." + cur_season)
@@ -237,6 +239,8 @@ def makeSceneSearchString(show, ep_obj):
 
     for curShow in showNames:
         for curEpString in epStrings:
+            if ep_obj.show.is_anime:
+                if ep_obj.show.release_groups is not None:
                     if len(ep_obj.show.release_groups.whitelist) > 0:
                         for keyword in ep_obj.show.release_groups.whitelist:
                             toReturn.append(keyword + '.' + curShow + '.' + curEpString)