Bug 190981 The image id of image in different pages are the same
The id of image generated by the same report item (such as chart) are the same, thought the image contents are in different pages.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/api/impl/Image.java
}
				catch ( MalformedURLException e )
				{
				}
				catch ( IOException e1 )
				{
				}
				try
				{
					return new BufferedInputStream( new FileInputStream( new File( this.id ) ) );
				}
				catch ( FileNotFoundException e )
				{
					logger.log( Level.SEVERE, e.getMessage( ), e );
				}
				return null;
			case IImage.CUSTOM_IMAGE :
				return new ByteArrayInputStream( this.data );
			case IImage.DESIGN_IMAGE :
				return new ByteArrayInputStream( this.data );
			case IImage.URL_IMAGE :
				try
				{
					URL url = new URL( this.id );
					return new BufferedInputStream( url.openStream( ) );
				}
				catch ( MalformedURLException e )
				{
				}
				catch ( IOException e1 )