Merge branch '3.4' into 4.4

* 3.4:
  [Phpunit] Fix running skipped tests expecting only deprecations
  [DependencyInjection] #35505 Fix typo in test name
  [Yaml][Inline] Fail properly on empty object tag and empty const tag
  Check non-null type for numeric type
  Check value isset to avoid PHP notice
  bug symfony#28179 [DomCrawler] Skip disabled fields processing in Form

Author: nicolas-grekas

Controller/TemplateController.php

@@ -55,17 +55,17 @@ public function templateAction(string $template, int $maxAge = null, int $shared
             throw new \LogicException('You can not use the TemplateController if the Templating Component or the Twig Bundle are not available.');
         }
 
-        if ($maxAge) {
+        if (null !== $maxAge) {
             $response->setMaxAge($maxAge);
         }
 
-        if ($sharedAge) {
+        if (null !== $sharedAge) {
             $response->setSharedMaxAge($sharedAge);
         }
 
         if ($private) {
             $response->setPrivate();
-        } elseif (false === $private || (null === $private && ($maxAge || $sharedAge))) {
+        } elseif (false === $private || (null === $private && (null !== $maxAge || null !== $sharedAge))) {
             $response->setPublic();
         }