grid record set values in column with check column config

[GoogleCodeExporter]

When there is a column configuration checkbox selected and changed some value 
of any column of the record. If the line is checked checadi value is lost. The 
following correction:

Ext.grid.CheckboxSelectionModel.prototype.onRowUpdated = function(v, index, r){
Ext.grid.CheckboxSelectionModel.superclass.onRowUpdated.call(this, v, index, r);
    if(this.isChecked(index)) {
        this.grid.getView().onRowCheck(index);
    }
};

Original issue reported on code.google.com by marlon...@gmail.com on 20 Mar 2012 at 5:01