According to the homepage[1]:
> Small change in Mori.h for compatibility with gcc_10 (thanks to J.
Puydt) [May 15, 2020].
Disabling the strictoverflow seems to be no longer necessary (I'm
relying on the check phase here).
[1] http://hep.itp.tuwien.ac.at/~kreuzer/CY/CYpalp.html
After #28029 it is necessary to add "strictoverflow" to the disabled
hardening flags. That probably has something to do with the `-O3` option
in palps makefile.
This commit also adds a test to check for this regression (as it only
occured at runtime).
