make: unifdef SUN5_0 (defined)

@@ -2326,15 +2326,11 @@
                         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"),