Add != and subtraction to issue invite protocol

src/proto/issue_invite.rs

@@ -69,11 +69,11 @@ muCMZProtocol! { issue_invite<max_invitations>,
     [L: Lox {id: R, bucket: H, trust_level: H, level_since: H, invites_remaining: H, blockages: H}, B: BucketReachability { date: R, bucket: H } ],
     [ I: Invitation { inv_id: J, date: S, bucket: H, blockages: H }, N: Lox {id: J, bucket: H, trust_level: H, level_since: H, invites_remaining: H, blockages: H }],
     L.bucket = B.bucket,
-    (1..=max_invitations).contains(L.invites_remaining),
+    L.invites_remaining != 0,
     N.bucket = L.bucket,
     N.trust_level = L.trust_level,
     N.level_since = L.level_since,
-//    N.invites_remaining = L.invites_remaining - 1,
+    N.invites_remaining = L.invites_remaining - {1},
     N.blockages = L.blockages,
     I. bucket = L.bucket,
     I.blockages = L.blockages