upstream: Explicitly initialize all members of the

upstream: Explicitly initialize all members of the

find_by_key_ctx struct.  Initializing a single member should be enough
(the spec says the remainder should be initialized as per the static
rules) but some GCCs warn on this which prevents us testing with -Werror
on those.  ok deraadt@ djm@

OpenBSD-Commit-ID: 687126e60a27d30f02614760ef3c3ae4e8d6af28