Xiang Li 3cf90a4dff v3rpc: do not send closing event
When a watch stream closes, both of the watcher.Chan and closec
will be closed.

If watcher.Chan is closed, we should not send out the empty event.
Sending the empty is wrong and waste a lot of CPU resources.
Instead we should just return.
2015-11-19 17:56:15 -08:00
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2015-11-19 17:56:15 -08:00