Revert "fixed boolean logic to match the spec"
Revert "fixed boolean logic to match the spec"

This reverts commit 86cf234b6104cdaed902b1c1fb78f01cf7ffe8b7.

ethereumjs/ethereumjs-vm,ethereumjs/ethereumjs-vm,ethereumjs/ethereumjs-vm,ethereum/ethereumjs-vm,ethereumjs/ethereumjs-vm,ethereumjs/ethereumjs-vm