[tor-bugs] #17686 [Tor]: Make our openssl-RNG calling code less scary.

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#17686: Make our openssl-RNG calling code less scary.
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 Reporter:  nickm       |          Owner:
     Type:  defect      |         Status:  needs_review
 Priority:  Medium      |      Milestone:  Tor: 0.2.7.x-final
Component:  Tor         |        Version:
 Severity:  Normal      |     Resolution:
 Keywords:  rng crypto  |  Actual Points:
Parent ID:  #17694      |         Points:
  Sponsor:              |
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Comment (by cypherpunks):

 Compilation started failing after the merge because of a mismatch between
 the type signature of `crypto_rand` and a mock function. The attached
 patch fixes the issue.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/17686#comment:9>
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