Print bug in ListGrid

[pavel.tavoda@f4s.sk]

function:
isc.A.getTableHTML = function isc_GridRenderer_getTableHTML(_1, _2, _3, _4, _5, _6)
....
return this.grid.getPrintHeaders(_26, _27) + this.$27w() + this.grid.getPrintFooters(_26, _27)

problem:
getPrintFooters returns 'undefined' which is appended to print HTML as String
so 'undefined' text is visible below all empty ListGrids in PrintCanvas


workaround:
isc.ListGrid.addMethods({
getPrintFooters: function(_1, _2) {
var ret = this.Super('getPrintFooters', arguments);
return ret ? ret : '';
}
});

[Isomorphic]

Thanks for pointing this out, we'll apply this fix most likely later this week.