Fix for ACL thinking a file exists when it does not.

Author: Potherca

src/WAC.php

@@ -295,6 +295,7 @@ private function getAclPath($path) {
 		foreach ($aclOptions as $aclPath) {
 			if (
 				$this->filesystem->has($aclPath)
+                && $this->filesystem->read($aclPath) !== false
 			) {
 				return $aclPath;
 			}