Fix for mariadb as well

lib/dialects/mariadb/connector-manager.js

@@ -90,7 +90,10 @@ module.exports = (function() {
             var config = self.config.replication.read[reads++]
             var config = self.config.replication.read[reads++]
 
 
             connect.call(self, function (err, connection) {
             connect.call(self, function (err, connection) {
+              if (connection) {
                 connection.queryType = 'read'
                 connection.queryType = 'read'
+              }
+
               done(null, connection)
               done(null, connection)
             }, config)
             }, config)
           },
           },
@@ -106,7 +109,10 @@ module.exports = (function() {
           name: 'sequelize-write',
           name: 'sequelize-write',
           create: function (done) {
           create: function (done) {
             connect.call(self, function (err, connection) {
             connect.call(self, function (err, connection) {
+              if (connection) {
                 connection.queryType = 'write'
                 connection.queryType = 'write'
+              }
+              
               done(null, connection)
               done(null, connection)
             }, self.config.replication.write)
             }, self.config.replication.write)
           },
           },