Bug 156166 Error occour when previewing attached report in web viewer.
Decription:Error occour when previewing attached report in web viewer. Steps to reproduce: 1.run attached reports in web viewer. Expeceted results: preview properly Actual results: Error occour when previewing the reports in web viewer while it works properly in html and PDF
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/document/RowSaveUtil.java
map.put( value, value );
			}
			int rowBytes = this.saveExprValue( map );
			IOUtil.writeInt( this.rowExprsDos, rowBytes );
		}
		catch ( IOException e )
		{
			throw new DataException( ResourceConstants.RD_SAVE_ERROR, e );
		}
	}
	
	/**
	 * @param lastRowIndex
	 * @param currIndex
	 * @throws IOException
	 */
	private void saveNullRowsBetween( int lastRowIndex, int currIndex )
			throws IOException
	{
		int gapRows = currIndex - lastRowIndex - 1;
		for ( int i = 0; i < gapRows; i++ )
		{
			IOUtil.writeInt( this.rowExprsDos, 0 );
			IOUtil.writeInt( this.rowLenDos, currentOffset );
			currentOffset += IOUtil.INT_LENGTH;
		}
	}
	
}