[ZF-10223] Unittests:

- fixed, if the extension pdo_sqlite not was loaded.

git-svn-id: http://framework.zend.com/svn/framework/standard/trunk@22666 44c647ce-9c0f-0410-b52a-842ac1e357ba

tests/Zend/Session/SaveHandler/DbTableTest.php

@@ -94,7 +94,9 @@ class Zend_Session_SaveHandler_DbTableTest extends PHPUnit_Framework_TestCase
      */
     public function tearDown()
     {
-        $this->_dropTable();
+        if ($this->_db instanceof Zend_Db_Adapter_Abstract) {
+            $this->_dropTable();
+        }
     }
 
     public function testConfigPrimaryAssignmentFullConfig()