[tor-bugs] #3035 [Tor Client]: fix a few clang-static analyzer complaints in 0.2.2

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#3035: fix a few clang-static analyzer complaints in 0.2.2
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 Reporter:  Sebastian   |          Owner:                    
     Type:  defect      |         Status:  needs_review      
 Priority:  normal      |      Milestone:  Tor: 0.2.2.x-final
Component:  Tor Client  |        Version:                    
 Keywords:              |         Parent:                    
   Points:              |   Actualpoints:                    
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Comment(by arma):

 The rest looks fine to me. Thanks!

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/3035#comment:7>
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