Fix straightforward cast/borrow lints

src/decoder/ifd.rs

@@ -445,7 +445,7 @@ impl Entry {
             // 2b: the value is at most 4 bytes or doesn't fit in the offset field.
             return Ok(match self.type_ {
                 Type::BYTE => Byte(self.offset[0]),
-                Type::SBYTE => SignedByte(i8::from(self.offset[0] as i8)),
+                Type::SBYTE => SignedByte(self.offset[0] as i8),
                 Type::UNDEFINED => Byte(self.offset[0]),
                 Type::SHORT => Short(self.r(bo).read_u16()?),
                 Type::SSHORT => SignedShort(self.r(bo).read_i16()?),

src/decoder/image.rs

@@ -643,11 +643,11 @@ impl Image {
             self.jpeg_tables.as_deref().map(|a| &**a),
         )?;
 
-        if output_row_stride == chunk_row_bytes as usize {
+        if output_row_stride == chunk_row_bytes {
             let tile = &mut buf[..chunk_row_bytes * data_dims.1 as usize];
             reader.read_exact(tile)?;
 
-            for row in tile.chunks_mut(chunk_row_bytes as usize) {
+            for row in tile.chunks_mut(chunk_row_bytes) {
                 super::fix_endianness_and_predict(
                     row,
                     color_type.bit_depth(),
@@ -678,11 +678,7 @@ impl Image {
                 }
             }
         } else {
-            for (_i, row) in buf
-                .chunks_mut(output_row_stride)
-                .take(data_dims.1 as usize)
-                .enumerate()
-            {
+            for row in buf.chunks_mut(output_row_stride).take(data_dims.1 as usize) {
                 let row = &mut row[..data_row_bytes];
                 reader.read_exact(row)?;