Fix Net_SFTP::filetype() block device recognition.
Merge pull request #486 from vvolodko/patch-1

Fix Net_SFTP::filetype() block device recognition.

* vvolodko/patch-1:
  Fix Net_SFTP::filetype() block device recognition.
Merge branch 'master' into php5

* master:
  Fix Net_SFTP::filetype() block device recognition.