Bug 313459 Problem with % when generating images in tables.
See the attached BirtProject, it has two reports. Each identical except for this difference: The image width/height is set to a %age value (50%) in one (TestImage.rptdesign) and not-set in the other (TestImageWorking.rptdesign). TestImage.rptdesign does not display the image in pdf, but works fine in html. TestImageWorking.rptdesign shows the image in both pdf and html. The %age setting seems to cause the problem in pdf format.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/nLayout/area/impl/ImageAreaLayout.java
}
				}
				layout = new ConcreteImageLayout( context, parent, content,
						reader.getByteArray( ) );
				break;
		}
	}
	private ILayout createAltTextLayout( int altTextType )
	{
		ITextContent altTextContent = createAltText( (IImageContent) content,
				altTextType );
		if ( null == altTextContent )
		{
			return null;
		}
		return new BlockTextArea( parent, context, altTextContent );
	}
	private ITextContent createAltText( IImageContent imageContent,
			int altTextType )
	{
		IReportContent report = imageContent.getReportContent( );
		if ( report == null )
		{
			return null;
		}
		ITextContent altTextContent = report.createTextContent( imageContent );
		altTextContent.setParent( imageContent.getParent( ) );
		String alt = imageContent.getAltText( );
		if ( null == alt )
		{