CS: Fix "PEAR.Files.IncludingFile.UseIncludeOnce" sniff.
Merge pull request #203 from bantu/cs-include-once

CS: Fix "PEAR.Files.IncludingFile.UseIncludeOnce" sniff.

* bantu/cs-include-once:
  CS: Fix "PEAR.Files.IncludingFile.UseIncludeOnce" sniff.