TemporalDegrain2 issue

[Lipomo]

Ah so that's it. 

I also just noticed another thing with Degrain radius (aka degrainTR) :

- degrainTR=0 make encodings crash

- There are no difference with  degrainTR=1 and  degrainTR=2 on several frames I compared, but there's a difference with degrainTR=2 and  degrainTR=3, as if degrainTR=1 is ignored and  degrainTR=2 (default value) is used instead.


If I found some other bugs with it, I'll report them here.