[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:  new
 Priority:  normal      |      Milestone:     
Component:  Tor Client  |        Version:     
 Keywords:              |         Parent:     
   Points:              |   Actualpoints:     
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 I started working on a branch to fix some clang complaints. Here's a
 checkpoint progress because a release is supposed to happen soon

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