Without this (particularly '.'), for some files it macro definitions cannot
be found the whole file is basically skipped.
Will make overall scan take quite a bit longer.
Change-Id: I7498b23ad9b27edd3a815c7fc51ef8501fa5a56a
Reviewed-on: https://code.wireshark.org/review/37567
Petri-Dish: Martin Mathieson <martin.r.mathieson@googlemail.com>
Tested-by: Petri Dish Buildbot
Reviewed-by: Martin Mathieson <martin.r.mathieson@googlemail.com>