[TYPO3-core] RFC #13427: Bug: Usage of ob_get_level() - here: sysext/openid

[netz-haut - stephan seitz]

This is an SVN patch request.

Type: Bugfix

Bugtracker references:
 http://bugs.typo3.org/view.php?id=13427

Branches:
 Trunk.

Problem:
 It is possible for some HA/HP server configurations, that ob_get_level() returns a wrong value (off-by-one error). This is a known php bug which is unlikely to be fixed, as it persists since the days of php4.

 For trunk, this has already been fixed for t3lib/class.t3lib_div.php , some person in charge of the bugtracker might close the bug?
 The same use of ob_get_level() occurs in the openid sysext. 
 So, the included patch only regards typo3/sysext/openid/class.tx_openid_return.php


Solution:
 Do not rely on ob_get_level(), just use ob_end_clean().



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