rustdoc-search: clean up `checkPath`

This computes the same result with less code by computing many of
the old checks at once:

* It won't enter the loop if clength > length, because then the
  result of length - clength will be negative and the
  loop conditional will fail.
* i + clength will never be greater than length, because it
  starts out as i = length - clength, implying that i + clength
  equals length, and it only goes down from there.
* The aborted variable is replaced with control flow.

0 files changed, 0 insertions, 0 deletions