lua bindings: fix a regression from b42195a2

I'm really sorry; I didn't notice and it only hit parts that
*apparently* aren't tested normally.  Only 32-bit systems would be
affected, due to the structure only changing ABI on 32-bit systems.
27 jobs for lua-libknot-regression in 39 minutes and 19 seconds (queued for 8 seconds)
Status Job ID Name Coverage
  Build
passed #309800
amd64 linux docker
archive

00:00:42

passed #309801
amd64 linux docker
build

00:00:50

passed #309802
amd64 linux docker
build-asan

00:00:51

passed #309803
docker
kres-gen

00:00:47

 
  Test
passed #309804
docker delayed
build:darwin

00:00:54

passed #309805
amd64 linux docker
deckard

00:02:13

passed #309806
docker delayed
doc

00:00:59

passed #309807
dind
docker

00:02:29

passed #309808
docker delayed
lint:other

00:00:55

passed #309809
amd64 linux docker delayed
lint:pedantic

00:01:10

passed #309810
amd64 linux docker
lint:scan-build

00:02:13

passed #309811
amd64 linux docker
lint:tidy

00:02:57

passed #309812
privileged
pkg:epel-7

00:02:23

passed #309813
privileged
pkg:fedora-29

00:03:11

passed #309814
amd64 linux docker
respdiff:basic

00:02:21

passed #309815
amd64 linux docker delayed
test:valgrind

00:01:58

 
  Extended
passed #309817
respdiff
fwd-tls6-kresd.udp6

00:10:51

passed #309818
respdiff
fwd-udp6-kresd.udp6

00:17:51

failed #309822
respdiff
fwd-udp6-unbound.tcp6

00:34:24

passed #309823
respdiff
fwd-udp6-unbound.tls6

00:33:24

passed #309821
respdiff
fwd-udp6-unbound.udp6

00:15:53

failed #309820
respdiff
iter.tls6

00:21:24

failed #309819
respdiff
iter.udp6

00:18:23

passed #309816
amd64 linux docker
pytests

00:04:04

passed #309824
respdiff
resperf:fwd-tls6.udp-asan

00:17:49

passed #309825
respdiff
resperf:fwd-udp6.udp-asan

00:23:19

passed #309826
respdiff
resperf:iter.udp-asan

00:18:18

 
Name Stage Failure
failed
fwd-udp6-unbound.tcp6 Extended
$ cp -t . respdiff_commitdir/*$RESPDIFF_TEST*.png ||:
$ cat respdiff_commitdir/$RESPDIFF_TEST/*histogram.tar.gz | tar -xf - -i ||:
Uploading artifacts...
Runtime platform arch=amd64 os=linux pid=126901 revision=a8a019e0 version=12.3.0
./j*: found 18 matching files

./*.png: found 2 matching files

./*histogram/*: found 6 matching files

Uploading artifacts to coordinator... ok
id=309822 responseStatus=201 Created token=AZd_EwsC
ERROR: Job failed: exit status 1
failed
iter.tls6 Extended
$ cp -t . respdiff_commitdir/*$RESPDIFF_TEST*.png ||:
$ cat respdiff_commitdir/$RESPDIFF_TEST/*histogram.tar.gz | tar -xf - -i ||:
Uploading artifacts...
Runtime platform arch=amd64 os=linux pid=125001 revision=a8a019e0 version=12.3.0
./j*: found 19 matching files

./*.png: found 2 matching files

./*histogram/*: found 7 matching files

Uploading artifacts to coordinator... ok
id=309820 responseStatus=201 Created token=nPa5yugo
ERROR: Job failed: exit status 1
failed
iter.udp6 Extended
$ cp -t . respdiff_commitdir/*$RESPDIFF_TEST*.png ||:
$ cat respdiff_commitdir/$RESPDIFF_TEST/*histogram.tar.gz | tar -xf - -i ||:
Uploading artifacts...
Runtime platform arch=amd64 os=linux pid=124561 revision=a8a019e0 version=12.3.0
./j*: found 19 matching files

./*.png: found 2 matching files

./*histogram/*: found 7 matching files

Uploading artifacts to coordinator... ok
id=309819 responseStatus=201 Created token=3ssxYmyC
ERROR: Job failed: exit status 1