Fix roundtrip of f64 field.

Author: windelbouwman

src/de.rs

@@ -732,11 +732,11 @@ where
             0xf8 => Err(self.error(ErrorCode::UnassignedCode)),
             0xf9 => {
                 let value = self.parse_f16()?;
-                visitor.visit_f32(value)
+                visitor.visit_f64(value as f64)
             }
             0xfa => {
                 let value = self.parse_f32()?;
-                visitor.visit_f32(value)
+                visitor.visit_f64(value as f64)
             }
             0xfb => {
                 let value = self.parse_f64()?;

tests/roundtrip.rs

@@ -14,6 +14,7 @@ struct MyStuff {
 enum MyStuffType {
     ver1 {
         x: f64,
+        y: f32,
     },
     ver2
 }
@@ -23,7 +24,8 @@ enum MyStuffType {
 fn test_roundtrip() {
     let stuff1 = MyStuff {
         data: MyStuffType::ver1 {
-            x: 2.5
+            x: 2.5,
+            y: 2.5,
         }
     };
     let data_bytes = serde_cbor::to_vec(&stuff1).unwrap();