refactor: fix clippy lints

Author: roderickvd

src/decoder/wav.rs

@@ -87,11 +87,10 @@ where
                     if bits == 32 {
                         let next_f32: Option<Result<f32, _>> = self.reader.samples().next();
                         next_f32.and_then(|value| {
-                            value.ok().map(|value| {
-                                #[cfg(feature = "integer-decoder")] // perf
-                                let value = value.to_sample();
-                                value
-                            })
+                            let value = value.ok();
+                            #[cfg(feature = "integer-decoder")] // perf
+                            let value = value.map(|value| value.to_sample());
+                            value
                         })
                     } else {
                         // > 32 bits we cannot handle, so we'll just return equilibrium
@@ -107,11 +106,10 @@ where
                 (SampleFormat::Int, 16) => {
                     let next_i16: Option<Result<i16, _>> = self.reader.samples().next();
                     next_i16.and_then(|value| {
-                        value.ok().map(|value| {
-                            #[cfg(not(feature = "integer-decoder"))] // perf
-                            let value = value.to_sample();
-                            value
-                        })
+                        let value = value.ok();
+                        #[cfg(not(feature = "integer-decoder"))] // perf
+                        let value = value.map(|value| value.to_sample());
+                        value
                     })
                 }
                 (SampleFormat::Int, 24) => {