<?php query_posts('showposts=1'); ('post_type=post&paged='.get_query_var('paged')); ?>
                  <?php if(have_posts()) : while(have_posts()) : the_post(); ?>

                <?php
                  if ( has_post_thumbnail() ) {
                  the_post_thumbnail();
                   }
                   else
                   {
                    get_the_image( array('size' => 'thumbnail', 'image_class' => 'wp-post-image'));
                   }

?>


<?php endwhile; ?>

<?php else : ?>

    <p class="no-posts"><?php _e('Sorry, no posts matched your criteria', 'example'); ?></p>

<?php endif; ?>
  <?php wp_reset_query(); ?>