Bug 129886 Delect a column contain the marge row which contain some item, Error message pop up
Details: Delect a column contain the marge row which contain some item, Error message pop up Setp: 1.New a library and add a 3*3 grid 2.Insert a label in cell(1,1) 3.Marge the cell of (1,1) and (1,2) 4.Delete column 1. Actual result: An error message pop up
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/core/model/schematic/ColumnHandleAdapter.java
}
		else if ( unit.equals( DesignChoiceConstants.UNITS_PERCENTAGE ) )
		{
			return String.valueOf( handle.getMeasure( ) ) + unit;
		}
		else
		{
			int px = (int) DEUtil.convertoToPixel( handle );
			if ( px <= 0 )
			{
				TableHandleAdapter adapter = HandleAdapterFactory.getInstance( )
						.getTableHandleAdapter( getTableParent( ) );
				return String.valueOf( adapter.getDefaultWidth( getColumnNumber( ) ) );
			}
			return String.valueOf( px );
		}
	}
	/**
	 * If the user define the row height
	 * 
	 * @return
	 */
	public boolean isCustomWidth( )
	{
		DimensionHandle handle = getColumnHandle( ).getWidth( );
		return handle.getMeasure( ) > 0;
	}
	/**
	 * Gets the columns number
	 *