catalog: impl std::fmt::Display trait for CatalogEntryType

Signed-off-by: Christian Ebner <c.ebner@proxmox.com>

src/pxar/catalog.rs

@@ -6,6 +6,7 @@
 use failure::*;
 use std::convert::TryFrom;
 use std::ffi::CStr;
+use std::fmt;
 
 #[repr(u8)]
 #[derive(Copy,Clone,PartialEq)]
@@ -38,6 +39,12 @@ impl TryFrom<u8> for CatalogEntryType {
     }
 }
 
+impl fmt::Display for CatalogEntryType {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{}", char::from(*self as u8))
+    }
+}
+
 pub trait BackupCatalogWriter {
     fn start_directory(&mut self, name: &CStr) -> Result<(), Error>;
     fn end_directory(&mut self) -> Result<(), Error>;