pam_smbpass: Wrap calls in talloc_stackframe() to avoid warnings about leaking memory

pam_smbpass: Wrap calls in talloc_stackframe() to avoid warnings about leaking memory

Any code in source3 is permitted to use talloc_tos() at any point, so we must protect all the library interfaces
against memory leaks this way.

Andrew Bartlett

Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>