remapping on more recent systems because this is less important
nowadays than in the days of small memories and timesharing. */
-EMACS_INT pure[PURESIZE / sizeof (EMACS_INT)] = {1,};
+EMACS_INT pure[(PURESIZE + sizeof (EMACS_INT) - 1) / sizeof (EMACS_INT)] = {1,};
#define PUREBEG (char *) pure
#else /* HAVE_SHM */