AG-829 - error in CellComp.prototype.stopEditing when prev value was null
AG-829 - error in CellComp.prototype.stopEditing when prev value was null

seanlandsman/ag-grid,ceolter/angular-grid,ceolter/ag-grid,ceolter/angular-grid,ceolter/ag-grid,seanlandsman/ag-grid,seanlandsman/ag-grid