Fixes index issue that showed wrong statistics per channel.

Change-Id: Ibc8dbb5add4adae673e57d2ffedb88d8eb0e55e7
diff --git a/aos/events/logging/log_stats.cc b/aos/events/logging/log_stats.cc
index 9383fdd..2d9604f 100644
--- a/aos/events/logging/log_stats.cc
+++ b/aos/events/logging/log_stats.cc
@@ -79,7 +79,6 @@
     if (channel->name()->string_view().find(FLAGS_name) != std::string::npos) {
       // Add a record to the stats vector.
       channel_stats.push_back({channel});
-      it++;
       // Lambda to read messages and parse for information
       stats_event_loop->MakeRawWatcher(
           channel,
@@ -99,6 +98,7 @@
             // update the overall logfile statistics
             logfile_stats.logfile_length += context.size;
           });
+      it++;
       // TODO (Stephan): Frequency of messages per second
       // - Sliding window
       // - Max / Deviation