void *xrealloc(void *ptr, size_t size) {
/* ANSI blesses realloc (0, x) but SunOS chokes on it */
void *res = ptr ? realloc (ptr, size) : malloc (size);
void *xrealloc(void *ptr, size_t size) {
/* ANSI blesses realloc (0, x) but SunOS chokes on it */
void *res = ptr ? realloc (ptr, size) : malloc (size);