* Add primary keys to Logs and Stats tables
Adds an auto_increment int(10) Id as PRIMARY KEY to Logs and Stats tables.
Closes ZoneMinder#2550 and makes ZoneMinder compatible with Galera writeset replication for InnoDB (Galera Cluster, Percona XtraDB Cluster).
* Do ALTER TABLE only if columns do not exist
* Add forgotten prepare/execute
bluikko