Fix FileInfo->getType errors

lib/private/files/fileinfo.php

 	}
 
 	public function offsetGet($offset) {
+		if ($offset === 'type') {
+			return $this->getType();
+		}
 		return $this->data[$offset];
 	}
 
 	 * @return \OCP\Files\FileInfo::TYPE_FILE | \OCP\Files\FileInfo::TYPE_FOLDER
 	 */
 	public function getType() {
-		return $this->data['type'];
+		if (isset($this->data['type'])) {
+			return $this->data['type'];
+		} else {
+			return $this->getMimetype() === 'httpd/unix-directory' ? self::TYPE_FOLDER : self::TYPE_FILE;
+		}
 	}
 
 	public function getData(){

lib/public/files/fileinfo.php

 
 interface FileInfo {
 	const TYPE_FILE = 'file';
-	const TYPE_FOLDER = 'folder';
+	const TYPE_FOLDER = 'dir';
 
 	/**
 	 * Get the Etag of the file or folder