[Vorbis] ov_open() vs. ov_test() failures

[Robert Hui]

Hi,

Just wanted to clear up a minor ambiguity.  For ov_open(), on failure, the 
file needs to be closed by fclose() instead of ov_clear().
Is this the same case on failure for ov_test(), or is ov_clear() used for 
both a success and failure with ov_test()?

The documentation suggests that ov_clear() is always used, but it seemed 
odd seeing the ov_open() documentation state the failure exception.

- Robert Hui