s4/libcli/raw: clang: Fix 'Value stored to 'p' is never read'

s4/libcli/raw: clang: Fix 'Value stored to 'p' is never read'

Fixes:

source4/libcli/raw/clisession.c:198:4: warning: Value stored to 'p' is never read <--[clang]
                        p += smbcli_req_pull_string(&req->in.bufinfo, mem_ctx, &parms->old.out.domain, p, -1, STR_TERMINATE);
                        ^    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
source4/libcli/raw/clisession.c:212:5: warning: Value stored to 'p' is never read <--[clang]
                                p += smbcli_req_pull_string(&req->in.bufinfo, mem_ctx, &parms->nt1.out.domain, p, -1, STR_TERMINATE);
                                ^    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
source4/libcli/raw/clisession.c:232:3: warning: Value stored to 'p' is never read <--[clang]
                p += smbcli_req_pull_string(&req->in.bufinfo, mem_ctx, &parms->spnego.out.workgroup, p, -1, STR_TERMINATE);
                ^    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Noel Power <noel.power@suse.com>
Reviewed-by: Andreas Schneider <asn@samba.org>