Update ERC677MultiBridgeToken.sol

[0xScratch]

Made 2 changes in this particular file:

1st: changed uint256 counter = 0; to uint256 counter; , cuz default value of any variable if it's a uint used to be 0, It's just a waste of gas to initialize it with 0. Believe it or not, this do save some amount of gas.

2nd: into -> in, just a grammatical fix

Thanks!