ndr basic: Check ndr_token_store return code

ndr basic: Check ndr_token_store return code

Fix for

*** CID 1457529:  Error handling issues  (CHECKED_RETURN)
/librpc/ndr/ndr_basic.c: 786 in ndr_push_full_ptr()
...
ID 1457529:  Error handling issues  (CHECKED_RETURN)
    Calling "ndr_token_store" without checking return value (as is done
    elsewhere 14 out of 17 times).

Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: David Disseldorp <ddiss@samba.org>
Autobuild-User(master): Gary Lockyer <gary@samba.org>
Autobuild-Date(master): Thu Jan  9 21:49:00 UTC 2020 on sn-devel-184