[tor-bugs] #4196 [Tor Client]: Fix issues found by Coverity Scan in run 224 (22 Sep)

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#4196: Fix issues found by Coverity Scan in run 224 (22 Sep)
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 Reporter:  nickm       |          Owner:                    
     Type:  defect      |         Status:  new               
 Priority:  normal      |      Milestone:  Tor: 0.2.3.x-final
Component:  Tor Client  |        Version:                    
 Keywords:              |         Parent:                    
   Points:              |   Actualpoints:                    
------------------------+---------------------------------------------------
 See branches cov_run244 for merge to master, and cov_run244_022 for merge
 to maint-0.2.2.

 The remaining issues in run 224 seem harmless or false-positivish.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/4196>
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