auth/kerberos: clang: Fix same instances of 'Value stored is never read'

auth/kerberos: clang: Fix same instances of 'Value stored is never read'

Fixes:

auth/kerberos/gssapi_pac.c:136:3: warning: Value stored to 'gss_maj' is never read <--[clang]
                gss_maj = gss_release_buffer(&gss_min, &pac_buffer);
                ^         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
auth/kerberos/gssapi_pac.c:137:3: warning: Value stored to 'gss_maj' is never read <--[clang]
                gss_maj = gss_release_buffer(&gss_min, &pac_display_buffer);
                ^         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
auth/kerberos/gssapi_pac.c:265:4: warning: Value stored to 'gss_maj' is never read <--[clang]
                        gss_maj = gss_release_buffer_set(&gss_min, &set);
                        ^         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
auth/kerberos/gssapi_pac.c:273:4: warning: Value stored to 'gss_maj' is never read <--[clang]
                        gss_maj = gss_release_buffer_set(&gss_min, &set);
                        ^         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
auth/kerberos/gssapi_pac.c:279:4: warning: Value stored to 'gss_maj' is never read <--[clang]
                        gss_maj = gss_release_buffer_set(&gss_min, &set);
                        ^         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
auth/kerberos/gssapi_pac.c:285:5: warning: Value stored to 'gss_maj' is never read <--[clang]
                                gss_maj = gss_release_buffer_set(&gss_min, &set);
                                ^         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
auth/kerberos/gssapi_pac.c:291:2: warning: Value stored to 'gss_maj' is never read <--[clang]
        gss_maj = gss_release_buffer_set(&gss_min, &set);
        ^         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
7 warnings generated.

Signed-off-by: Noel Power <noel.power@suse.com>
Reviewed-by: Gary Lockyer <gary@catalyst.net.nz>
Autobuild-User(master): Noel Power <npower@samba.org>
Autobuild-Date(master): Mon Jul  8 11:04:15 UTC 2019 on sn-devel-184