Bug 195607 NPE is thrown when calling DimensionHandle:: getAbsoluteValue()
If a DimensionHandle did not set DimensionValue, NPE will thrown when calling DimensionHandle:: getAbsoluteValue().
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/DimensionHandle.java
*         constant <code>false</code> if the dimension is given by a
	 *         standard dimension.
	 */
	public boolean isKeyword( )
	{
		IChoiceSet choiceSet = propDefn.getChoices( );
		if ( choiceSet != null && choiceSet.contains( getStringValue( ) ) )
			return true;
		return false;
	}
	/**
	 * Returns the numeric measure part of the dimension. For example, if the
	 * dimension value is "2.3cm", the measure is 2.3.
	 * 
	 * @return the numeric measure of the dimension, return <code>0.0</code>
	 *         if the dimension from an choice.
	 */
	public double getMeasure( )
	{
		if ( isKeyword( ) )
		{
			
			return 0.0;
		}
		DimensionValue value = (DimensionValue) getValue( );
		if ( value != null )
			return value.getMeasure( );
		return 0.0;
	}
	/**