[Debian-med-packaging] Bug#959465: spoa - fixes to move forward with Gcc 10

[Étienne Mollier]

Control: tags -1 upstream
Control: tags -1 patch
Control: thanks

Hi Andreas,

I pushed the patch on Salsa and verified it helped at least with
the "racon" package (#957747); build time test is still running,
but the build in itself went through.

Kind Regards,
-- 
Étienne Mollier <etienne.mollier at mailoo.org>
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