ZF-2409: Empty driver options are not ignored


When driver options passed to the Zend_Db::factory() method is an empty string it is not ignored but instead type casted to an array containing an empty string at index 0 which cause PDO to disabled autocommit.

The problem lies in the line 191 of the Zend_Db_Adapter_Abstract class.

The line is

and should be changed to


Assigning and unsetting fix version priority.

Resolved in r9577

Updating for the 1.6.0 release.