boolean undefined values should not be converted to false

lib/dao.js

@@ -161,7 +161,7 @@ module.exports = (function() {
           }
 
           // Convert boolean-ish values to booleans
-          if (this._hasBooleanAttributes && this._isBooleanAttribute(key) && value !== null) {
+          if (this._hasBooleanAttributes && this._isBooleanAttribute(key) && value !== null && value !== undefined) {
             value = !!value
           }
 

test/dao.test.js

@@ -1289,7 +1289,7 @@ describe(Support.getTestDialectTeaser("DAO"), function () {
         })
       })
     })
-    it("returns null for null, undefined, and unset boolean values", function(done) {
+    it.only("returns null for null, undefined, and unset boolean values", function(done) {
       var Setting = this.sequelize.define('SettingHelper', {
         setting_key: DataTypes.STRING,
           bool_value: { type: DataTypes.BOOLEAN, allowNull: true },