Bug 176467 Wrong page break effect for spanned cell
When page break occurs on spanned cell, this cell on next page is lost, which cause incorrect page layout. Report design to reproduce the error is attached.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/layout/pdf/PDFTableLM.java
* 1. resolve all unresolved cell 2. resolve table bottom border 3.
		 * update height of Root area 4. update the status of TableAreaLayout
		 */
		int borderHeight = 0;
		if ( layout != null )
		{
			layout.resolveAll( );
			borderHeight = layout.resolveBottomBorder( );
			layout.remove( (TableArea) root );
		}
		
		root.setHeight( getCurrentBP( ) + getOffsetY( ) + borderHeight );
	}
	public int getColumnNumber( )
	{
		return columnNumber;
	}
	/**
	 * resolve cell border conflict
	 * 
	 * @param cellArea
	 */
	public void resolveBorderConflict( CellArea cellArea, boolean isFirst )
	{
		if ( layout != null )
		{
			layout.resolveBorderConflict( cellArea, isFirst );
		}
	}
	private class ColumnWidthResolver