Rekt by Vogu? Here's why!

vogu-rekt.txt

Have you lost funds to the Vogu item contract with no explanation? Here's the explanation.
This function in the Vogu item contract was bugged.

```
/**
 * @dev mint `numberToken` for msg.sender aka who call method.
 * @param numberToken number token collector want to mint
 */
function _mintVogu(uint256 numberToken) internal returns (bool) {
    for (uint256 i = 0; i < numberToken; i++) {
        uint256 tokenIndex = totalSupply();
        if (tokenIndex < MAX_VOGU) _safeMint(_msgSender(), tokenIndex); // This is the bad line!
    }
    return true;
}
```

On the line marked above as the bad line, the Vogu item contract would check to make sure that fulfilling
the mint wouldn't create more than 7,777 Vogu. If it wouldn't, the mint occurs. Then the function returns
true.

... returns true?

This line should have been a guarded `require` statement that would otherwise cause the transaction to
fail and revert without taking funds from callers. A little `require(tokenIndex < MAX_VOGU, "sold out")`
would have saved the day.

This contract could have used a bit more time in the shop.