[HttpKernel] Fix non-scalar check in surrogate fragment renderer

Author: aschempp

Fragment/AbstractSurrogateFragmentRenderer.php

@@ -96,9 +96,11 @@ private function generateSignedFragmentUri(ControllerReference $uri, Request $re
     private function containsNonScalars(array $values): bool
     {
         foreach ($values as $value) {
-            if (\is_array($value)) {
-                return $this->containsNonScalars($value);
-            } elseif (!\is_scalar($value) && null !== $value) {
+            if (\is_scalar($value) || null === $value) {
+                continue;
+            }
+
+            if (!\is_array($value) || $this->containsNonScalars($value)) {
                 return true;
             }
         }