angular-ui/ui-select — pull request #251 by ivanvoznyakovsky (2014-10-01 15:50:37+00:00)
Title: set default value to empty array

in case if items source is not defined in $scope when initializing multiselect instance of ui-select, we'll get an undefined from ctrl.parserResult.source($scope). then next line will throw an exception when truing to filter undefined.