Make branches work by repopulating the predecoder every time through. This is probabl...

Make branches work by repopulating the predecoder every time through. This is probably fine as far as the predecoder goes, but the simple cpu might want to not refetch something it already has. That reintroduces the self modifying code problem though.

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extra : convert_revision : 802197e65f8dc1ad657c6b346091e03cb563b0c0