Use keyed fields in struct literals to appease go vet on Google AppEngine

read.go

@@ -1052,7 +1052,7 @@ func decryptStream(key []byte, useAES bool, ptr objptr, rd io.Reader) io.Reader
 		rd = &cbcReader{cbc: cbc, rd: rd, buf: make([]byte, 16)}
 	} else {
 		c, _ := rc4.NewCipher(key)
-		rd = &cipher.StreamReader{c, rd}
+		rd = &cipher.StreamReader{S: c, R: rd}
 	}
 	return rd
 }