clippy: replace transmute with &*

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

src/backup/dynamic_index.rs

@@ -194,7 +194,7 @@ impl IndexFile for DynamicIndexReader {
         if pos >= self.index.len() {
             None
         } else {
-            Some(unsafe { std::mem::transmute(self.chunk_digest(pos).as_ptr()) })
+            Some(unsafe { &*(self.chunk_digest(pos).as_ptr() as *const [u8; 32]) })
         }
     }
 

src/backup/fixed_index.rs

@@ -166,7 +166,7 @@ impl IndexFile for FixedIndexReader {
         if pos >= self.index_length {
             None
         } else {
-            Some(unsafe { std::mem::transmute(self.index.add(pos * 32)) })
+            Some(unsafe { &*(self.index.add(pos * 32) as *const [u8; 32]) })
         }
     }