Bug 198909 page-break-after: avoid doesn't work in some special cases
page-break-after: avoid doesn't work in some special cases. Plese refer to attached report.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/layout/pdf/PDFImageLM.java
assert ( parent instanceof ILineStackingLayoutManager );
		ILineStackingLayoutManager lineParent = (ILineStackingLayoutManager) parent;
		
		if ( root.getAllocatedHeight( ) > lineParent
				.getCurrentMaxContentHeight( ) )
		{
			if ( !parent.isPageEmpty( ) )
			{
				return true;
			}
			else
			{
				
				
				root.setAllocatedHeight( lineParent
						.getCurrentMaxContentHeight( ) );
				parent.addArea( root, false, false );
				return false;
			}
		}
		else
		{
			if ( parent.getCurrentIP( ) + root.getAllocatedWidth( ) > maxWidth )
			{
				if ( !lineParent.isEmptyLine( ) )
				{
					boolean ret = lineParent.endLine( );
					assert ( ret );
					return layoutChildren( );
				}