Two Bug !

[guoxiangCN]

bug1: add duplicated key into the trie will incr the size but the key was replaced.
bug2: the meta was not store in the node of last character of key but the new child with val=0x00
`

trie.Add("apple\x00p1", "1") // key contains 0
trie.Add("apple\x00p2", "1") // key contains 0
trie.Add("apple", "1") // after apple inserted, the above 2 keys are dispear.

`