Manuel Pégourié-Gonnard 9c6118c498 Factor one more occurrence of code into function
This may look like a behaviour change because one check has been added to the
function that was previously done in only one of the 3 call sites. However it
is not, because:
- for the 2 call sites in verify(), the test always succeeds as path_cnt is 0.
- for the call site in verify_child(), the same test was done later anyway in
  verify_top()
2017-08-08 11:06:50 +02:00
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