Fix build with gcc 9.3.0's -Werror=alloc-size-larger-than=

4 jobs for gcc-9.3.0 in 4 minutes and 55 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Docker Image
passed #2364892
debian-testing

00:00:22

 
  Build And Test
passed #2364893
autotools

00:04:33

passed #2364894
meson

00:01:38

passed #2364895
meson-noglamor

00:01:25