ChangeLog, pass1b.c:

ChangeLog, pass1b.c:
  pass1b.c (clone_file_block): Don't clear the dup_map flag if the block
  	also shares data with the fs metadata when the count drops to 1, since
  	the block should still be cloned, as fs metadata isn't included in the
  	count.
ChangeLog, pass3.c:
  pass3.c (adjust_inode_count): Fix bug where we didn't keep the
  	internal and external inode counts in sync when we decremented an
  	inode whose link count was already zero.  Now we skip incrementing or
  	decrementing both link counts if we would cause an overflow condition.
  	(expand_dir, expand_dir_proc): Change where we update the inode block
  	count and size files so that the block count field is updated
  	correctly when we create an indirect block.