Changed default CI_DB_result::_data_seek() return value to FALSE and removed the method from drivers that don't support it
diff --git a/system/database/drivers/postgre/postgre_result.php b/system/database/drivers/postgre/postgre_result.php
index 394b8b6..f913bc9 100644
--- a/system/database/drivers/postgre/postgre_result.php
+++ b/system/database/drivers/postgre/postgre_result.php
@@ -128,7 +128,7 @@
* this internally before fetching results to make sure the
* result set starts at zero
*
- * @return array
+ * @return bool
*/
protected function _data_seek($n = 0)
{