if there is an import error on rarfile, use a dummy module that

will always be false...

[git-p4: depot-paths = "//depot/": change = 1134]

ZipStorage.py

@@ -12,8 +12,15 @@ import iterzipfile
 zipfile = iterzipfile
 import itertarfile
 tarfile = itertarfile
-import iterrarfile
-rarfile = iterrarfile
+try:
+	import iterrarfile
+	rarfile = iterrarfile
+except ImportError:
+	class rarfile():
+		pass
+
+	rarfile = rarfile()
+	rarfile.is_rarfile = lambda x: False
 
 import FileDIDL
 from DIDLLite import StorageFolder, Item, VideoItem, AudioItem, TextItem, ImageItem, Resource