BIND 10 #1152: dhcp6 triggered unused-but-set-variable of g++ 4.6

[BIND 10 Development]

#1152: dhcp6 triggered unused-but-set-variable of g++ 4.6
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            Reporter:  jinmei  |                        Owner:
                Type:  defect  |                       Status:  new
            Priority:  major   |                    Milestone:  New Tasks
           Component:  dhcp    |                     Keywords:
           Sensitive:  0       |              Defect Severity:  High
         Sub-Project:  DNS     |  Feature Depending on Ticket:
Estimated Difficulty:  0       |          Add Hours to Ticket:  0
         Total Hours:  0       |                    Internal?:  0
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 See this report from a user:
 https://lists.isc.org/pipermail/bind10-users/2011-July/000070.html

 As far as I can see, this is the only point (at least in the main code
 excluding tests) where this warning can happen.

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Ticket URL: <http://bind10.isc.org/ticket/1152>
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