Fix invalid datetime format
diff --git a/system/libraries/Xmlrpc.php b/system/libraries/Xmlrpc.php
index 5da6ea6..d702e90 100644
--- a/system/libraries/Xmlrpc.php
+++ b/system/libraries/Xmlrpc.php
@@ -1404,14 +1404,14 @@
 	{
 		if ($utc == 1)
 		{
-			$t = strftime("%Y%m%dT%H:%M:%S", $time);
+			$t = strftime("%Y%m%dT%H:%i:%s", $time);
 		}
 		else
 		{
 			if (function_exists('gmstrftime'))
-				$t = gmstrftime("%Y%m%dT%H:%M:%S", $time);
+				$t = gmstrftime("%Y%m%dT%H:%i:%s", $time);
 			else
-				$t = strftime("%Y%m%dT%H:%M:%S", $time - date('Z'));
+				$t = strftime("%Y%m%dT%H:%i:%s", $time - date('Z'));
 		}
 		return $t;
 	}