tweak to get rid of warning when TZ is disabled

libc/misc/time/time.c

@@ -1939,7 +1939,9 @@ void tzset(void)
 	daylight = !!_time_tzinfo[1].tzname[0];
 	timezone = _time_tzinfo[0].gmt_offset;
 
+#if defined(__UCLIBC_HAS_TZ_FILE__)
  FAST_DONE:
+#endif
 	TZUNLOCK;
 }