BIND 10 #2164: introduce RRset::getSIGRdataCount()

[BIND 10 Development]

#2164: introduce RRset::getSIGRdataCount()
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                   Reporter:         |                 Owner:  jelte
  jinmei                             |                Status:  reviewing
                       Type:  task   |             Milestone:
                   Priority:         |  Sprint-20120821
  medium                             |            Resolution:
                  Component:         |             Sensitive:  0
  libdns++                           |           Sub-Project:  DNS
                   Keywords:         |  Estimated Difficulty:  2
            Defect Severity:  N/A    |           Total Hours:  0
Feature Depending on Ticket:         |
  scalable inmemory                  |
        Add Hours to Ticket:  0      |
                  Internal?:  0      |
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Comment (by muks):

 Replying to [comment:7 muks]:
 > Hi Jelte
 >
 > Replying to [comment:6 jelte]:
 > > - since rrsig_ is a shared_ptr, you can just do 'if (rrsig_) {'
 >
 > Done. :)
 >
 > > - perhaps we can also add a test to make sure getSigRdataCount()
 returns 0 after removeRRSig() is called
 >
 > Done. :) This one made me check `Message::removeRRset()` and there's a
 bug in it that is untested (in the existing implementation), but #2165
 updates that code, so I have left it as-is in this branch.

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Ticket URL: <http://bind10.isc.org/ticket/2164#comment:8>
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