main/mcpp: fix CVE-2019-14274

Patch taken from Debian.
7 jobs for !6905 with 3.11/mcpp in 6 minutes and 5 seconds
latest detached
Status Job ID Name Coverage
  Lint
failed #95233
docker-alpine x86_64 allowed to fail
lint

00:01:18

 
  Build
passed #95238
docker-alpine ci-build aarch64
build-aarch64

00:01:55

passed #95239
docker-alpine ci-build armv7
build-armv7

00:02:27

passed #95237
docker-alpine ci-build ppc64le
build-ppc64le

00:04:47

passed #95236
docker-alpine ci-build s390x
build-s390x

00:01:12

passed #95235
docker-alpine ci-build x86
build-x86

00:02:11

passed #95234
docker-alpine ci-build x86_64
build-x86_64

00:01:19

 
Name Stage Failure
failed
lint Lint
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