doTransfer loop error fix #59
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In doTransfer function the previousBalanceFrom was assigned before the TokenController(controller).onTransfer call, which can cause error in case the token controller starts a new transfer from or to the original _from address, where currently it would assign the first value no matter what happens afterwards.
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In doTransfer function the previousBalanceFrom was assigned before the TokenController(controller).onTransfer call, which can cause error in case the token controller starts a new transfer from or to the original _from address, where currently it would assign the first value no matter what happens afterwards.