bug#31663: dino: segfaults on message delivery since libsignal-protocol-c update

[Mark H Weaver]

The update of 'libsignal-protocol-c' to 2.3.2 in commit
05ca7a916a54d32ae4603bcd90918fb19e907704 broke dino.  Since that update,
dino now immediately segfaults whenever a message is sent or received
using OMEMO.

Note that upstream dino has its own copy of 'libsignal-protocol-c' in a
submodule.  Our 'dino' package arranges to instead use our system copy
of 'libsignal-protocol-c', and I'm glad for that.  Unfortunately, it no
longer works.

I tried updating 'dino' to the latest upstream commit
(60982bff67809e62b43476b49e30a9bd37491930), but that didn't help.

      Mark