fix: 1.8.0 beta 3 - dies on PHP 5.3, refs #1141

fix: 1.8.0 beta 3 - dies on PHP 5.3, refs #1141

php 5.3 does not support the direct access to arrays in a function's return

* inc/functions.php
  * added temporary varialble in build_clickable_similies function to assure php 5.3 support
* misc.php
  * added temporary variable like in inc/functions.php