"vertical split a cell" works error when the row contains "colpan>1" cells

[tengshengbo]

Follow this simple steps:

1. create a table with 3 rows, 3 columns.
2. merge the first two cells in the first row.
3. veritical split the last cell(the cell after the merged cell) in the first row.

The table structure becomes messy after the third step.
The bug is in "tabletools/plugin.js", cellInRow function. Developer should avoid adding duplicate cells, similar with "cellInCol".

[tengshengbo]

My fix for this:

	function cellInRow( tableMap, rowIndex, cell )
	{
		var oRow = tableMap[ rowIndex ];
		if ( typeof cell == 'undefined' ){
			var oRowtemp = [];
			for ( var c = 0; c < oRow.length; c++ )
			{
				oRowtemp.push( oRow[ c ] );
				if ( oRow[ c ].colSpan > 1 )
					c += oRow[ c ].colSpan - 1;
			}
			return oRowtemp;
		}
			

		for ( var c = 0 ; oRow && c < oRow.length ; c++ )
		{
			if ( cell.is && oRow[c] == cell.$ )
				return c;
			else if ( c == cell )
				return new CKEDITOR.dom.element( oRow[ c ] );
		}
		return cell.is ? -1 : null;
	}