From c3cd3990879d970d89b8db5ae6500fe18e17c281 Mon Sep 17 00:00:00 2001
From: Andy Miller <rhuk@mac.com>
Date: Wed, 26 Aug 2020 14:08:31 -0600
Subject: [PATCH] allow null for classes

---
 system/src/Grav/Common/Twig/TwigExtension.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/system/src/Grav/Common/Twig/TwigExtension.php b/system/src/Grav/Common/Twig/TwigExtension.php
index f05f502ec..e6f9a53dc 100644
--- a/system/src/Grav/Common/Twig/TwigExtension.php
+++ b/system/src/Grav/Common/Twig/TwigExtension.php
@@ -1420,10 +1420,12 @@ class TwigExtension extends AbstractExtension implements GlobalsInterface
      * @param $classes
      * @return string|string[]|null
      */
-    public static function svgImageFunction($path, $classes)
+    public static function svgImageFunction($path, $classes = null)
     {
         $path = Utils::fullPath($path);
 
+        $classes = $classes ?: '';
+
         if (file_exists($path)) {
             $svg = file_get_contents($path);
             $classes = " inline-block $classes";