Fix test case

Author: kamil-tekiela

ext/mysqli/tests/mysqli_stmt_data_seek.phpt

@@ -87,7 +87,7 @@ require_once 'skipifconnectfailure.inc';
 ?>
 --EXPECT--
 mysqli_stmt object is not fully initialized
-No result set associated with the statement
+mysqli_stmt_data_seek(): No result set associated with the statement
 int(3)
 int(1)
 int(1)