Bug 203709 NullPointerException in TableAreaLayout
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/layout/pdf/cache/TableAreaLayout.java
}
				CellArea cell = (CellArea)area;
				int colId = cell.getColumnID( );
				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] = null;
					}
				}
			}
		}
		
		public CellArea getCell(int colId)
		{
			if(colId<start || colId>end)
			{
				assert(false);
				return null;
			}
			return cells[colId-start];
		}
		
		public void addArea(IArea area)
		{
			if(!(area instanceof DummyCell))
			{
				row.addChild( area );