Merge pull request #35 from OrlovEvgeny/master

edit slice
diff --git a/uuid.go b/uuid.go
index b8d756d..920dadf 100644
--- a/uuid.go
+++ b/uuid.go
@@ -140,7 +140,7 @@
 }
 
 func encodeHex(dst []byte, uuid UUID) {
-	hex.Encode(dst[:], uuid[:4])
+	hex.Encode(dst, uuid[:4])
 	dst[8] = '-'
 	hex.Encode(dst[9:13], uuid[4:6])
 	dst[13] = '-'