Add explicit lint-comment-style fallthrough annotations. GCC now assumes that if you don't have these you're making a mistake, which is annoying. XXX: This changeset updates the AG output files only (by hand) and is XXX: abusive - rebuilding them will erase the change. However, I need XXX: to get things to build before I can try to get AG to issue the XXX: annotations itself, so this seems like a reasonable expedient.

#include <stdlib.h>
#include <err.h>
#include "must.h"

void *must_malloc(size_t len) {
  void *x = malloc(len);
  if (!x) {
    errx(1, "Out of memory");
  }
  return x;
}

void *must_realloc(void *ptr, size_t len) {
  void *x = realloc(ptr, len);
  if (!x) {
    errx(1, "Out of memory");
  }
  return x;
}