LogDog: Actually use default max buffer age.

client/logdog/butler/butler.go

 // Copyright 2015 The LUCI Authors. All rights reserved.
 // Use of this source code is governed under the Apache License, Version 2.0
 // that can be found in the LICENSE file.
 
 package butler
 
 import (
         "errors"
         "fmt"
         "io"
@@ skipping 131 matching lines @@
 
         bc := bundler.Config{
                 Clock:            clock.Get(ctx),
                 Project:          config.Project,
                 Prefix:           config.Prefix,
                 MaxBufferedBytes: streamBufferSize,
                 MaxBundleSize:    config.Output.MaxSize(),
         }
         if config.BufferLogs {
                 bc.MaxBufferDelay = config.MaxBufferAge
+                if bc.MaxBufferDelay <= 0 {
+                        bc.MaxBufferDelay = DefaultMaxBufferAge
+                }
         }
         lb := bundler.New(bc)
 
         b := &Butler{
                 c:   &config,
                 ctx: ctx,
 
                 bundler:         lb,
                 bundlerDrainedC: make(chan struct{}),
 
@@ skipping 376 matching lines @@
         // shutdown prematurely, so this should be reasonably quick.
         b.Activate()
 }
 
 // Returns the configured Butler error.
 func (b *Butler) getRunErr() error {
         b.shutdownMu.Lock()
         defer b.shutdownMu.Unlock()
         return b.runErr
 }