Fix pre key handling

SignalServiceKit/src/Loki/Messaging/LKDeviceLinkMessage.m

@@ -35,6 +35,7 @@
     SSKProtoContentBuilder *contentBuilder = SSKProtoContent.builder;
     NSError *error;
     // Build the pre key bundle message
+    if (self.kind == LKDeviceLinkMessageKindRequest) {
         PreKeyBundle *preKeyBundle = [OWSPrimaryStorage.sharedManager generatePreKeyBundleForContact:recipient.recipientId];
         SSKProtoPrekeyBundleMessageBuilder *preKeyBundleMessageBuilder = [SSKProtoPrekeyBundleMessage builderFromPreKeyBundle:preKeyBundle];
         SSKProtoPrekeyBundleMessage *preKeyBundleMessage = [preKeyBundleMessageBuilder buildAndReturnError:&error];
@@ -44,6 +45,7 @@
         } else {
             [contentBuilder setPrekeyBundleMessage:preKeyBundleMessage];
         }
+    }
     // Build the device link message
     SSKProtoLokiDeviceLinkMessageBuilder *deviceLinkMessageBuilder = [SSKProtoLokiDeviceLinkMessage builder];
     [deviceLinkMessageBuilder setMasterHexEncodedPublicKey:self.masterHexEncodedPublicKey];