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(ITS#7954) [LMDB] fix uninitialize struct member.

Full_Name: Jean-Christophe Dubois
Version: 2.4.40
OS: Linux
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (

In the mdb_env_cwalk() function the mc_flags  member of the "mc" MDB_cursor
instance is not initialized.

But in the mdb_page_search_root() called a bit later (line 8407) this flag will
be updated from this uninitialized value.

The mc_flags member needs to be initialized to a known value.

Patch available at URL below: