@@ -6,6 +6,8 @@

 from SortedDict import SortedDict

 import Utils

+zero_length_md5 = "d41d8cd98f00b204e9800998ecf8427e"

+

 class FileDict(SortedDict):

     def __init__(self, mapping = {}, ignore_case = True, **kwargs):

         SortedDict.__init__(self, mapping = mapping, ignore_case = ignore_case, **kwargs)

@@ -13,6 +15,7 @@ class FileDict(SortedDict):

         self.by_md5 = dict() # {md5: set(relative_files)}

     def record_md5(self, relative_file, md5):

+        if md5 == zero_length_md5: return

         if md5 not in self.by_md5:

             self.by_md5[md5] = set()

         self.by_md5[md5].add(relative_file)