Merge pull request #734 from renski-dev/master

cargo build fails without the "symphonia" feature flag, because try_seek can create a DecoderError::IoError.

Author: dvdsk

src/decoder/mod.rs

@@ -780,7 +780,6 @@ impl fmt::Display for DecoderError {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         let text = match self {
             DecoderError::UnrecognizedFormat => "Unrecognized format",
-            #[cfg(feature = "symphonia")]
             DecoderError::IoError(msg) => &msg[..],
             #[cfg(feature = "symphonia")]
             DecoderError::DecodeError(msg) => msg,