make: unifdef SUN5_0 (defined)

*** 2326,2340 ****
                          fprintf(stderr,
                                  catgets(catd, 1, 349, "Could not load `qrsh': %s\n"),
                                  errmsg(errno));
                          _exit(1);
                  } else {
- #if defined (HP_UX) || defined (linux) || defined (SUN5_0)
                          int             status;
- #else
-                         union wait      status;
- #endif
                          pid_t pid;
                          while ((pid = wait(&status)) != childPid) {
                                  if (pid == -1) {
                                          fprintf(stderr,
                                                  catgets(catd, 1, 350, "wait() failed: %s\n"),
--- 2326,2336 ----