Make CI_Lang::line()'s first parameter mandatory (optional doesn't make sense)
diff --git a/system/core/Lang.php b/system/core/Lang.php
index 3236709..290b38b 100644
--- a/system/core/Lang.php
+++ b/system/core/Lang.php
@@ -166,7 +166,7 @@
* @param bool $log_errors Whether to log an error message if the line is not found
* @return string Translation
*/
- public function line($line = '', $log_errors = TRUE)
+ public function line($line, $log_errors = TRUE)
{
$value = ($line === '' OR ! isset($this->language[$line])) ? FALSE : $this->language[$line];