MFC r316584 (by cem):

smbfs: Fix an indentation level

Based on the change in r242386, it seems clear that scred was intended to
be released in all paths at exit.

No functional change. This line's indent was just the result of a bad copy
paste from the previous free() in an early exit path.

Reported by: PVS-Studio
Sponsored by: Dell EMC Isilon