JS error when detaching frozen component

	/*Patch for ZK-4135*/
	zk.afterLoad('zul.mesh', function() {
		var xFrozen = {};
		zk.override(zul.mesh.Frozen.prototype, xFrozen, {
			_clearColumnBorders : function() {
				var mesh = this.parent,
					lastFrozenCols = this._lastFrozenCols,
					frozenBorderClz = this.$s('col');
				if (lastFrozenCols && lastFrozenCols.length != 0) {
					for (var i = 0; i < lastFrozenCols.length; i++) {
						var nextCol = lastFrozenCols[i] && lastFrozenCols[i].nextSibling;
						if (nextCol)
							jq(nextCol).css('border-left', '');
					}
				}
				jq(mesh.$n()).find('.' + frozenBorderClz).removeClass(frozenBorderClz);
			}
		});//zk.override
	});//zk.afterLoad