BIND 10 #2445: suppress initial log

[BIND 10 Development]

#2445: suppress initial log
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            Reporter:  jinmei        |                        Owner:  jelte
                Type:  defect        |                       Status:
            Priority:  medium        |  reviewing
           Component:  Boss of BIND  |                    Milestone:
            Keywords:                |  Sprint-20121218
           Sensitive:  0             |                   Resolution:
         Sub-Project:  Core          |                 CVSS Scoring:
Estimated Difficulty:  4             |              Defect Severity:  N/A
         Total Hours:  0             |  Feature Depending on Ticket:
                                     |          Add Hours to Ticket:  0
                                     |                    Internal?:  0
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Comment (by jinmei):

 One more thing: in `LoggerManagerImpl::flushBufferAppenders()`,
 I'd make sure dynamic_cast succeeds:

 {{{#!cpp
         internal::BufferAppender* app =
             dynamic_cast<internal::BufferAppender*>(it->get());
         assert(app != NULL); // <= add this line
         app->flush();
 }}}

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Ticket URL: <https://bind10.isc.org/ticket/2445#comment:23>
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