[ci skip] DocBlocks for DB drivers' result classes
Partially fixes issue #1295.
diff --git a/system/database/drivers/ibase/ibase_result.php b/system/database/drivers/ibase/ibase_result.php
index 6ee0a7d..bbad9d8 100644
--- a/system/database/drivers/ibase/ibase_result.php
+++ b/system/database/drivers/ibase/ibase_result.php
@@ -129,7 +129,7 @@
*
* Returns the result set as an object
*
- * @param string
+ * @param string $class_name
* @return object
*/
protected function _fetch_object($class_name = 'stdClass')