[dovecot/core] 721312: lib-lua: Use source instead of short_src

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/dovecot/core
  Commit: 7213120b640a56fff65b91c673af96b9319e40d5
      https://github.com/dovecot/core/commit/7213120b640a56fff65b91c673af96b9319e40d5
  Author: Aki Tuomi <aki.tuomi at dovecot.fi>
  Date:   2018-10-25 (Thu, 25 Oct 2018)

  Changed paths:
    M src/lib-lua/dlua-dovecot.c

  Log Message:
  -----------
  lib-lua: Use source instead of short_src

short_src is a limited value, and also an byte array
instead of a pointer so it should not be returned.

Found by coverity.



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