Return EMPTY instance if allocated with 0 length

Author: patrickfav

src/main/java/at/favre/lib/bytes/Bytes.java

@@ -86,8 +86,9 @@ public static Bytes allocate(int length) {
      * @return new instance
      */
     public static Bytes allocate(int length, byte defaultValue) {
+        if (length == 0) return EMPTY;
         byte[] array = new byte[length];
-        if (defaultValue != 0 && length > 0) {
+        if (defaultValue != 0) {
             Arrays.fill(array, defaultValue);
         }
         return wrap(array);