Fix handling of last block in an index - files at the ends of directories were missing.  The last block can contain valuable info (it can be a node), so don't discard.
Fix handling of last block in an index - files at the ends of directories were missing.  The last block can contain valuable info (it can be a node), so don't discard.

breezechen/DiscUtils,quamotion/discutils,drebrez/DiscUtils,breezechen/DiscUtils