Possible reinitialisation to token contract

[bokkypoobah]

From oleksii's audit:

BokkyPooBahsTokenTeleportationServiceSmartContract/contracts/BTTSTokenFactory.sol

Line 148 in 06c15ed

require(self.owner == address(0));

it is possible to transfer ownership immediately to 0x0 address, and make init function callable again. Perhaps check the symbol or name instead of owner, or introduce an isInit var. Not exploitable through the BTTSToken though.