Simple Testimonials, test for no client name

Hi and thank you for the great testimonial plugin
I love how you can pick the one you want from the widget!

My question: What if I am not using the Client Name and Company Name fields? I want to suppress the comma.

what conditional would test for whether there is data?

// conditional test here - if client and company have data, do this
                <h5>

				<?php echo $this->client; ?>,<br /><?php echo $this->company; ?>

				<?php if( testimonial_has_permission( $this->ID ) ): ?>
				<?php echo sprintf( '<br />Web: <a href="%s">%s</a>,<br />Email: <a href="mailto:%s">%s</a>', $this->website, $this->website, $this->email, $this->email ); ?>
				<?php endif; ?>

			</h5>

http://ww.wp.xz.cn/plugins/clean-testimonials/