(ITS#8348) lmdb MDB_VL32 typeo in null check for txn0

[jeremiah . morrill]

Full_Name: Jeremiah Morrill
Version: lmdb 0.9.70
OS: Windows
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (24.120.130.199)


In the latest git repo, in mdb_env_close0, the null check on env->me_txn0 is
pointing to env->me_txn:

This:

#ifdef MDB_VL32
        if (env->me_txn0 && env->me_txn->mt_rpages)

vs.

#ifdef MDB_VL32
        if (env->me_txn0 && env->me_txn0->mt_rpages)