[PATCH 7/9] py3: max does not accept 'None'

[Finucane, Stephen]

On 29 Nov 22:10, Stephen Finucane wrote:
> max(n, None), where n is a valid number, is valid in Python 2 but not
> Python 3. Replace these calls with something that works in both
> versions of Python.
> 
> Signed-off-by: Stephen Finucane <stephen.finucane at intel.com>

Again, simple fix. Merged.