Revert PR #77: Added compatibility with other extensions modifying zend_error_cb.
Merge branch 'revert-77'
Merge branch 'master' of github.com:xdebug/xdebug
Implement issue #1004: Ability to halt on warning/notice.
Merged pull request #94
Merge branch 'master' of github.com:xdebug/xdebug