Bug 164989 [Viewers] ColumnViewer#getColumnViewerOwner() doesn't respects column count
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/TableViewer.java
ViewerRow part = (ViewerRow) item.getData(ViewerRow.ROWPART_KEY);
		if (part == null) {
			part = new TableViewerRow(((TableItem) item));
		}
		return part;
	}
	/**
	 * Create a new row with style at index
	 * 
	 * @param style
	 * @param rowIndex
	 * @return ViewerRow
	 */
	private ViewerRow createNewRowPart(int style, int rowIndex) {
		TableItem item;
		if (rowIndex >= 0) {
			item = new TableItem(table, style, rowIndex);
		} else {
			item = new TableItem(table, style);
		}
		return getViewerRowFromItem(item);
	}
	/* (non-Javadoc)
	 * @see org.eclipse.jface.viewers.ColumnViewer#getItemAt(org.eclipse.swt.graphics.Point)
	 */
	protected Item getItemAt(Point p) {
		return table.getItem(p);
	}
}