If No Featured Image

Hi all,

I’m using the theme “Shuttershot”. When I make a blog post, but I don’t set a featured image, it just shows a blank image.
I realise this is because it’s using fall back/default image instead. What I’d like to do is have it so that if there’s no featured image uploaded, it doesn’t show an image.

The code I’m working with is:

<div class="entry">

<?php
if ( has_post_thumbnail() ) { ?>
	<a href="<?php the_permalink() ?>"><img class="postimg" src="<?php bloginfo('stylesheet_directory'); ?>/timthumb.php?src=<?php get_image_url(); ?>&h=200&w=470&zc=1" alt=""/></a>
<?php } else { ?>
	<a href="<?php the_permalink() ?>"><img class="postimg" src="<?php bloginfo('template_directory'); ?>/images/dummy.png" alt="" /></a>
<?php } ?>
<?php the_excerpt(); ?>
<div class="clear"></div>
</div>

I’ve had a look at the documentation, but it didn’t seem to help. Unfortunately, my knowledge of PHP is seriously lacking.

I initially thought that if I just removed the “else” code, then it would work, but it didn’t appear to. Unless I didn’t remove enough/the right bit?

Anyway, hopefully that makes sense.

Thanks in advance,
Will.