Fix redundant sync sends.

SignalServiceKit/src/Messages/OWSMessageSender.m

@@ -959,6 +959,11 @@ NSString *const OWSMessageSenderRateLimitedException = @"RateLimitedException";
         // 2. Check SignalRecipient's state.
         BOOL hasDeviceMessages = deviceMessages.count > 0;
 
+        DDLogInfo(@"%@ mayHaveLinkedDevices: %d, hasDeviceMessages: %d",
+            self.logTag,
+            mayHaveLinkedDevices,
+            hasDeviceMessages);
+
         if (!mayHaveLinkedDevices && !hasDeviceMessages) {
             DDLogInfo(@"%@ Ignoring sync message without secondary devices: %@", self.logTag, [message class]);
             OWSAssert([message isKindOfClass:[OWSOutgoingSyncMessage class]]);