Fix a few clippy warnings

src/decode.rs

@@ -81,7 +81,7 @@ where
 
     if unlikely(data.len() < QOI_PADDING_SIZE) {
         return Err(Error::UnexpectedBufferEnd);
-    } else if unlikely(&data[..QOI_PADDING_SIZE] != &QOI_PADDING) {
+    } else if unlikely(data[..QOI_PADDING_SIZE] != QOI_PADDING) {
         return Err(Error::InvalidPadding);
     }
 

src/encode.rs

@@ -88,6 +88,7 @@ pub struct QoiEncoder<'a> {
 
 impl<'a> QoiEncoder<'a> {
     #[inline]
+    #[allow(clippy::cast_possible_truncation)]
     pub fn new(data: &'a (impl AsRef<[u8]> + ?Sized), width: u32, height: u32) -> Result<Self> {
         let data = data.as_ref();
         let mut header =