Fix second check for quota size (#24989)

Author: nickvergessen

lib/private/legacy/helper.php

@@ -469,7 +469,7 @@ public static function maxUploadFilesize($dir, $freeSpace = null) {
 	 */
 	public static function freeSpace($dir) {
 		$freeSpace = \OC\Files\Filesystem::free_space($dir);
-		if ($freeSpace !== \OCP\Files\FileInfo::SPACE_UNKNOWN) {
+		if ($freeSpace < \OCP\Files\FileInfo::SPACE_UNLIMITED) {
 			$freeSpace = max($freeSpace, 0);
 			return $freeSpace;
 		} else {