Fixes to PackBitsReader

src/decoder/mod.rs

@@ -1141,10 +1141,7 @@ impl<R: Read + Seek> Decoder<R> {
             CompressionMethod::LZW => {
                 Box::new(LZWReader::new(reader, usize::try_from(compressed_length)?))
             }
-            CompressionMethod::PackBits => Box::new(PackBitsReader::new(
-                reader,
-                usize::try_from(compressed_length)?,
-            )),
+            CompressionMethod::PackBits => Box::new(PackBitsReader::new(reader, compressed_length)),
             CompressionMethod::Deflate | CompressionMethod::OldDeflate => {
                 Box::new(DeflateReader::new(reader))
             }