[tor-bugs] #7115 [Tor]: Fix compilation warnings under cparser/firm

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#7115: Fix compilation warnings under cparser/firm
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 Reporter:  nickm      |          Owner:                    
     Type:  defect     |         Status:  needs_review      
 Priority:  minor      |      Milestone:  Tor: 0.2.3.x-final
Component:  Tor        |        Version:                    
 Keywords:  tor-relay  |         Parent:                    
   Points:             |   Actualpoints:                    
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Comment(by nickm):

 Part of this was #7116, which I merged.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/7115#comment:3>
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