FFTW blur radius fix

[Lawrence37]

Closes #7225.

[Desmis]

@Lawrence37

This PR also fix #7226.
Change in iplocallab.cc = > ImProcFunctions::BlurNoise_Local

[Desmis]

@Lawrence37

It's good for me.

I will be away from home for 15 days or 3 weeks. But I think I can be reached.

[Lawrence37]

Thanks for reviewing @Desmis.

[Desmis]

It is ok for me for this part (fftw).

In my proposition (fixbug-blur), there was also the solution to issue 7226, as well as a notable improvement for the user when he wants to blur a background. I changed the way the "Recovery based on luminance mask" function works. Now this function works with "Gaussian blur (noise and grain) , Median, and Guided Filter instead of only Guide Filter.

I assume that these proposals will be dealt with later, separately from this PR.

[Lawrence37]

Since this pull request also handles the pp3 compatibility, I will merge it and see if the other fixes and improvements can be incorporated directly from your branch @Desmis.