tree-wide: use reallocarray instead of our home-grown realloc_multiply (#8279)

There isn't much difference, but in general we prefer to use the standard
functions. glibc provides reallocarray since version 2.26.

I moved explicit_bzero is configure test to the bottom, so that the two stdlib
functions are at the bottom.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/nspawn/nspawn-mount.c b/src/nspawn/nspawn-mount.c
index 5193f1f69d..0ee69114b2 100644
--- a/src/nspawn/nspawn-mount.c
+++ b/src/nspawn/nspawn-mount.c
@@ -48,7 +48,7 @@ CustomMount* custom_mount_add(CustomMount **l, unsigned *n, CustomMountType t) {
         assert(t >= 0);
         assert(t < _CUSTOM_MOUNT_TYPE_MAX);
 
-        c = realloc_multiply(*l, (*n + 1), sizeof(CustomMount));
+        c = reallocarray(*l, *n + 1, sizeof(CustomMount));
         if (!c)
                 return NULL;