Add to FimF cover_exclusion_regexp and smaller cover when href not found.

fanficfare/adapters/base_adapter.py

@@ -481,6 +481,8 @@ class BaseSiteAdapter(Configurable):
         if self.getConfig('include_images'):
             return self.story.addImgUrl(storyurl,imgurl,self._fetchUrlRaw,cover=True,
                                         coverexclusion=self.getConfig('cover_exclusion_regexp'))
+        else:
+            return (None,None)
 
     # bs3 & bs4 are different here.
     # will move to a bs3 vs bs4 block if there's lots of changes.