[2.1.0] Ext.data.proxy.SQL crash on select with no sorters

[NiNiX]

Hi,

The SQL proxy crashes at line 281:

ln = params.sorters.length;

with the following error message: Uncaught TypeError: Cannot read property 'length' of null

Use case:

Ext.define('App.model.Game', {
    extend: 'Ext.data.Model',
    config: {
        fields: [
            { name: 'id', type: 'int' },
            { name: 'name', type: 'string' }
        ],

        proxy: { type: 'sql' }
    }
});

var store = Ext.create('Ext.data.Store', {
    model: 'App.model.Game',
    filters: [ {property: 'name', value: 'foo'} ],
    remoteFilter: true
});

store.load(function(records, operation, success) {
    [...]
}

Same kind of bug than those reported in this thread and this one, but 13 lines below

Thanks