fixed handling with empty / unreadable directories

src/lib/file/encoder.rs

@@ -136,7 +136,7 @@ impl FileEncoder {
 		let buf = match &self.filetype_encoding_information {
 			FileTypeEncodingInformation::Directory(directory_children) => {
 				let encoded_directory_children = if directory_children.is_empty() {
-					Vec::new()
+					Vec::<u64>::new().encode_directly()
 				} else {
 					directory_children.encode_directly()
 				};

src/lib/io/zffwriter.rs

@@ -868,6 +868,7 @@ fn create_iterator<C: AsRef<Path>>(
 			warn!("The content of the file {} can't be read, due the following error: {e}.\
 				The file will be stored as an empty file.", &current_dir.as_ref().display());
 			file_header.metadata_ext.insert(METADATA_EXT_KEY_UNACCESSABLE_FILE.to_string(), current_dir.as_ref().to_string_lossy().to_string().into());
+			files.push((current_dir.as_ref().to_path_buf(), file_header));
 			return Err(e.into());
 		}
 	};