Merge pull request #30181 from nextcloud/backport/30160/stable22

[stable22] Check resource before closing in encryption wrapper

Author: PVince81

lib/private/Files/Storage/Wrapper/Encryption.php

@@ -756,8 +756,12 @@ private function copyBetweenStorage(Storage\IStorage $sourceStorage, $sourceInte
 				fclose($source);
 				fclose($target);
 			} catch (\Exception $e) {
-				fclose($source);
-				fclose($target);
+				if (is_resource($source)) {
+					fclose($source);
+				}
+				if (is_resource($target)) {
+					fclose($target);
+				}
 				throw $e;
 			}
 			if ($result) {