Rescan corrupted albums.

scanner/TreeWalker.py

@@ -23,6 +23,7 @@ class TreeWalker:
 		cached_album = None
 		if os.path.exists(cache):
 			print "Has cache %s" % path
+			try:
 				cached_album = Album.from_cache(cache)
 				if file_mtime(path) <= file_mtime(cache):
 					print "Album is fully cached"
@@ -30,6 +31,9 @@ class TreeWalker:
 					album = cached_album
 					for photo in album.photos:
 						self.all_photos.append(photo)
+			except:
+				print "Cache is corrupted. Rescanning album."
+				cached_album = None
 		if not cached:
 			album = Album(path)
 		for entry in os.listdir(path):