Fix for bad paragraph code in listing-listview.php template

On line 105 to 107 in listing-listview.php, the excerpt generated will have one of two problems: 1. Paragraph tag within a paragraph tag, since the_excerpt() creates its own tags, or 2. Creating an unwanted empty paragraph tag when there is no excerpt.

I fixed by changing to:

<div class="geodir-entry-content">
if( isset( $character_count ) && ( $character_count || $character_count=='0' ) ) {
	echo '<p>', geodir_max_excerpt($character_count), '</p>';
}
else { 
	the_excerpt(); 
}
</div>

This file could also using some serious cleaning up (proper indenting, etc) and comments.