Bug 155778 Unit picas should be larger than points in pdf
Description: Unit picas is twelve times larger than points Steps to reproduce: 1. Set label item's padding top to 100 picas and preview in pdf 2. Set label item's padding top to 100 points and preview in pdf Expected result: according to css standdard,picas is larger than points Actaul result: Points unit is larger than picas
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/css/engine/value/AbstractLengthManager.java
throw createInvalidFloatTypeDOMException( type );
	}
	/**
	 * Implements {@link
	 * ValueManager#computeValue(CSSStylableElement,String,CSSEngine,int,StyleMap,Value)}.
	 */
	public Value computeValue( CSSStylableElement elt, CSSEngine engine,
			int idx, Value value )
	{
		if ( value.getCssValueType( ) == CSSValue.CSS_PRIMITIVE_VALUE )
		{
			switch ( value.getPrimitiveType( ) )
			{
				case CSSPrimitiveValue.CSS_NUMBER :
					return value;
				case CSSPrimitiveValue.CSS_PX :
					float v = value.getFloatValue( );
					CSSContext cx = engine.getCSSContext( );
					float ratio = cx.getPixelUnitToMillimeter( );
					return new FloatValue( CSSPrimitiveValue.CSS_NUMBER, v
							* ratio / 25.4f * 72000.0f );
				case CSSPrimitiveValue.CSS_MM :
					v = value.getFloatValue( );
					return new FloatValue( CSSPrimitiveValue.CSS_NUMBER,
							v / 25.4f * 72000.0f );
				case CSSPrimitiveValue.CSS_CM :
					v = value.getFloatValue( );
					return new FloatValue( CSSPrimitiveValue.CSS_NUMBER,
							v / 2.54f * 72000.0f );
				case CSSPrimitiveValue.CSS_IN :