Bug#972017: pyfai ftbfs with python3.9 as supported python3 version

[PICCA Frederic-Emmanuel]

Looking at the build log of pyfai, I can find this

https://launchpadlibrarian.net/501584970/buildlog_ubuntu-groovy-armhf.pyfai_0.19.0+dfsg1-3build1_BUILDING.txt.gz

Selecting previously unselected package python3-silx.
Preparing to unpack .../238-python3-silx_0.13.1+dfsg-1_armhf.deb ...
Unpacking python3-silx (0.13.1+dfsg-1) ...
Selecting previously unselected package python3-silx-dbg.
Preparing to unpack .../239-python3-silx-dbg_0.13.1+dfsg-1_armhf.deb ...
Unpacking python3-silx-dbg (0.13.1+dfsg-1) ...

so it seems that this was rebuild with the wrong version on silx.
not the one rebuilt with python3.9 support.

I guess this by looking at other packages which containes

Selecting previously unselected package python3-scipy-dbg:armhf.
Preparing to unpack .../237-python3-scipy-dbg_1.5.2-2build1_armhf.deb ...
Unpacking python3-scipy-dbg:armhf (1.5.2-2build1) ...


the build1 version :)