fix handling of unicode during decode

src/reader.rs

@@ -75,11 +75,11 @@ impl <R: Reader> Decoder<IoError> for DecoderReader<R> {
     }
     fn read_str(&mut self) -> Result<String, IoError> {
         let len = try!(self.read_uint());
-        let mut string = String::new();
+        let mut vector = Vec::with_capacity(len as uint);
         for _ in range(0, len) {
-            string.push_char(try!(self.reader.read_char()));
+            vector.push(try!(self.reader.read_u8()));
         }
-        Ok(string)
+        Ok(String::from_utf8(vector).unwrap())
     }
     fn read_enum<T>(&mut self, _: &str,
     f: |&mut DecoderReader<R>| -> Result<T, IoError>) -> Result<T, IoError> {

src/test.rs

@@ -160,3 +160,9 @@ fn boole(){
     the_same(true);
     the_same(false);
 }
+
+#[test]
+fn unicode() {
+    the_same("å".to_string());
+    the_same("aåååååååa".to_string());
+}