Disallow refernces in calls if the declaration is a reference

Disallow refernces in calls if the declaration is a reference
("allow_call_time_pass_reference clean").
  PhpWiki is now allow_call_time_pass_reference = Off clean,
  but several external libraries may not.
  In detail these libs look to be affected (not tested):
  * Pear_DB odbc
  * adodb oracle

git-svn-id: svn://svn.code.sf.net/p/phpwiki/code/trunk@3689 96ab9672-09ca-45d6-a79d-3d69d39ca109