Prevent accidentally burning tokens

[hats-bug-reporter[bot]]

Github username: -- Twitter username: -- Submission hash (on-chain): 0x315dfb2fb8554c58ecec1d74ffae951070be39a601b3437de3771055dede0184 Severity: low

Description: Description\ Minting and burning tokens to address(0) prevention

Instances (14):

File: InvestToken.sol

124:         _mint(to, amount);

136:         _burn(from, amount);

161:         _burn(from, amount);

174:         _burn(from, amount);

175:         _mint(to, amount);

246:         _mint(receiver, shares);

281:         _mint(receiver, shares);

318:         _burn(owner, shares);

356:         _burn(owner, shares);

File: USDE.sol

101:         _mint(to, amount);

113:         _burn(from, amount);

138:         _burn(from, amount);

151:         _burn(from, amount);

152:         _mint(to, amount);

[AndreiMVP]

We'll assume backend handles burning / minting competently