Bug 138732 getValue fails
The following script fails on Data Element OnCreate if( this.getValue() < 70000){ this.getStyle().backgroundColor = "Purple"; }
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/executor/ImageItemExecutor.java
String fmtExpr = imageDesign.getImageFormat( );
				assert imgExpr != null;
				handleValueImage( imgExpr, fmtExpr, imageContent );
				break;
			default :
				logger.log( Level.SEVERE,
						"[ImageItemExecutor] invalid image source" ); 
				context.addException( new EngineException(
						MessageConstants.INVALID_IMAGE_SOURCE_TYPE_ERROR ) );
				assert false;
		}
	}
	protected void handleURIImage( String uriExpr,
			IImageContent imageContent )
	{
		
		
		
		
		imageContent.setImageSource( IImageContent.IMAGE_URI );
		assert uriExpr != null;
		Object uriObj = context.evaluate( uriExpr );
		String strUri = null;
		if ( uriObj != null )
		{
			strUri = uriObj.toString( );
		}
		else if ( uriExpr != null && uriExpr.length( ) > 0 )
		{
			strUri = uriExpr;