Bug 203709 NullPointerException in TableAreaLayout
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/layout/pdf/cache/TableAreaLayout.java
int colSpan = cell.getColSpan( );
				if((colId>=start) && (colId+colSpan-1<=end))
				{
					int loopEnd = Math.min(colSpan, end-colId+1);
					for(int j=0; j<loopEnd; j++)
					{
						cells[colId - start + j] = cell;
					}
				}
			}
		}
		
		public IContent getContent()
		{
			return row.getContent( );
		}
		
		public void remove(int colId)
		{
			
			row.removeChild( getCell(colId));
		}
		
		public void remove(IArea area)
		{
			if(area!=null)
			{
				if(!(area instanceof DummyCell))
				{
					row.removeChild( area );