Fix update command when index is specified

Before "/event update 1 text 'foo'" would ignore the argument after
the index

1 files changed, 0 insertions, 1 deletions

diff --git a/src/event_main.cc b/src/event_main.cc
index f9b7dde..ffcf4b5 100644
--- a/src/event_main.cc
+++ b/src/event_main.cc
@@ -207,7 +207,6 @@ bool update(EventUtils* utils,
         }
         first_event = events.front()->id();
         event.swap(events[indexes.front()]);
-        ++it;
     } else {
         event = utils->next();
         if (!utils->good()) return true;