Snippets for adjtimex 1.29 from Fedora s390x

Sourced from https://kojipkgs.fedoraproject.org/packages/adjtimex/1.29/37.fc45/data/logs/s390x/build.log.

• adjtimex.c:729:7: warning: variable ‘saveerr’ set but not used [-Wunused-but-set-variable=]
    729 |   int saveerr;
        |       ^~~~~~~
  

• adjtimex.c:1339:10: warning: variable ‘ret’ set but not used [-Wunused-but-set-variable=]
   1339 |   int n, ret;
        |          ^~~
  

• adjtimex.c:1338:8: warning: variable ‘ch’ set but not used [-Wunused-but-set-variable=]
   1338 |   char ch, buf[64], *s;
        |        ^~
  

• adjtimex.c:547:3: warning: ignoring return value of ‘write’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
    547 |   write (port_fd, &val, 1);
        |   ^~~~~~~~~~~~~~~~~~~~~~~~
  

• adjtimex.c:561:3: warning: ignoring return value of ‘read’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
    561 |   read (port_fd, &ret, 1);
        |   ^~~~~~~~~~~~~~~~~~~~~~~
  

• adjtimex.c:1646:7: warning: ignoring return value of ‘fgets’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   1646 |       fgets(buf, BUFLEN, stdin);
        |       ^~~~~~~~~~~~~~~~~~~~~~~~~
  

• adjtimex.c:1684:7: warning: ignoring return value of ‘fgets’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   1684 |       fgets(buf, BUFLEN, stdin);
        |       ^~~~~~~~~~~~~~~~~~~~~~~~~