tape: multi-volume: fix overflow check

the part number cannot go above 255 at the moment, but if it ever gets
bumped to a bigger integer type this boundary wouldn't cause a
compile-error. explicitly checking for overflowing u8 makes this a bit
more future-proof, and shuts up clippy as well ;)

Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>

diff --git a/src/tape/file_formats/multi_volume_writer.rs b/src/tape/file_formats/multi_volume_writer.rs
index 8d51969e1ace05097fed6bca37a222d58b2bf183..d1b2c70bf3f7a763e2ddd0285215de3eba0455dc 100644 (file)
--- a/src/tape/file_formats/multi_volume_writer.rs
+++ b/src/tape/file_formats/multi_volume_writer.rs
@@ -69,7 +69,7 @@ impl <'a> TapeWrite for MultiVolumeWriter<'a> {
         }
 
         if self.writer.is_none() {
-            if self.header.part_number >= 255 {
+            if self.header.part_number == u8::MAX {
                 proxmox_sys::io_bail!("multi-volume writer: too many parts");
             }
             self.writer = Some(