Revert "Remove unneeded brackets in else-if-sentence"

This reverts commit 251e954.

Author: Crizz0

src/Phpbb/TranslationValidator/Validator/LangKeyValidator.php

@@ -695,7 +695,7 @@ public function validateHtml($file, $key, $sourceString, $originString)
 					}
 					$failedUnclosed = true;
 				}
-				else if (substr($possibleHtml, -3) !== ' />') && !in_array($tag, $allowedMissingClosingTag)
+				else if ((substr($possibleHtml, -3) !== ' />') && !in_array($tag, $allowedMissingClosingTag))
 				{
 					$openTags[] = $tag;
 				}