Fix for MariaDB 11

[iruis]

excepted nhibernate schema update on mariadb 11

NHibernate.Tool.hbm2ddl.SchemaUpdate: 16:14:56,465 ERROR SchemaUpdate:0 - could not complete schema update
System.InvalidCastException: Unable to cast object of type 'System.Int64' to type 'System.UInt32'.
   at MySql.Data.MySqlClient.SchemaProvider.GetIndexesAsync(String[] restrictions, Boolean execAsync, CancellationToken cancellationToken)
   at MySql.Data.MySqlClient.SchemaProvider.GetSchemaInternalAsync(String collection, String[] restrictions, Boolean execAsync, CancellationToken cancellationToken)
   at MySql.Data.MySqlClient.ISSchemaProvider.GetSchemaInternalAsync(String collection, String[] restrictions, Boolean execAsync, CancellationToken cancellationToken)
   at MySql.Data.MySqlClient.SchemaProvider.GetSchemaAsync(String collection, String[] restrictions, Boolean execAsync, CancellationToken cancellationToken)
   at MySql.Data.MySqlClient.MySqlConnection.GetSchemaAsync(Boolean execAsync, String collectionName, String[] restrictionValues, CancellationToken cancellationToken)
   at MySql.Data.MySqlClient.MySqlConnection.GetSchema(String collectionName, String[] restrictionValues)
   at NHibernate.Dialect.Schema.AbstractDataBaseSchema.GetIndexInfo(String catalog, String schemaPattern, String tableName)
   at NHibernate.Dialect.Schema.AbstractTableMetadata.InitIndexes(IDataBaseSchema meta)
   at NHibernate.Dialect.Schema.AbstractTableMetadata..ctor(DataRow rs, IDataBaseSchema meta, Boolean extras)
   at NHibernate.Dialect.Schema.MySQLTableMetadata..ctor(DataRow rs, IDataBaseSchema meta, Boolean extras)
   at NHibernate.Dialect.Schema.MySQLDataBaseSchema.GetTableMetadata(DataRow rs, Boolean extras)
   at NHibernate.Tool.hbm2ddl.DatabaseMetadata.GetTableMetadata(String name, String schema, String catalog, Boolean isQuoted)
   at NHibernate.Cfg.Configuration.GenerateSchemaUpdateScript(Dialect dialect, IDatabaseMetadata databaseMetadata)
   at NHibernate.Tool.hbm2ddl.SchemaUpdate.Execute(Action`1 scriptAction, Boolean doUpdate)

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