Correct key pointer usage in bdb_idl_fetch_key.

Author: Shogo Matsumoto

Resolves: #1356165

diff --git a/servers/slapd/back-bdb/idl.c b/servers/slapd/back-bdb/idl.c

--- a/servers/slapd/back-bdb/idl.c

+++ b/servers/slapd/back-bdb/idl.c

@@ -628,7 +628,7 @@ bdb_idl_fetch_key(

 					BDB_DISK2ID( j, i );

 				}

 			}

-			rc = cursor->c_get( cursor, key, &data, flags | DB_NEXT_DUP );

+			rc = cursor->c_get( cursor, kptr, &data, flags | DB_NEXT_DUP );

 		}

 		if ( rc == DB_NOTFOUND ) rc = 0;

 		ids[0] = i - ids;