Use iter() instead of into_iter() where appropriate.

src/value.rs

@@ -364,9 +364,8 @@ fn parse_rational<E>(data: &[u8], offset: usize, count: usize)
 }
 
 fn parse_sbyte(data: &[u8], offset: usize, count: usize) -> Value {
-    let bytes = data[offset .. offset + count].into_iter()
-        .map(|x| *x as i8)
-        .collect();
+    let bytes = data[offset .. offset + count].iter()
+        .map(|x| *x as i8).collect();
     Value::SByte(bytes)
 }
 

src/writer.rs

@@ -502,9 +502,7 @@ fn compose_value<E>(value: &Value)
             Ok((5, vec.len(), buf))
         },
         Value::SByte(ref vec) => {
-            let bytes = vec.into_iter()
-                .map(|x| *x as u8)
-                .collect();
+            let bytes = vec.iter().map(|x| *x as u8).collect();
             Ok((6, vec.len(), bytes))
         },
         Value::Undefined(ref s, _) =>