lib: data-stack - start sentry checks immediately after the reserved buffer Our sentries are written with byte-precision, no need to round up before doing the checks.
lib: data-stack - start sentry checks immediately after the reserved buffer
Our sentries are written with byte-precision, no need to round up before
doing the checks.

Signed-off-by: Phil Carmody <e888d2bd6f13f82caa51a37c03d034c76f661ba3@dovecot.fi>

jwm/dovecot-notmuch,jwm/dovecot-notmuch,jwm/dovecot-notmuch,jwm/dovecot-notmuch,jwm/dovecot-notmuch