Correct punctuation

The fullstop ran right into the link, add a space if there is a link

Change-Id: I9b72d2cc109b891b3baa93d0791b71cb21927c23
Signed-off-by: Hugh Davenport <hugh@catalyst.net.nz>

htdocs/theme/raw/templates/collection/index.tpl

@@ -56,6 +56,6 @@
     </table>
        {$pagination|safe}
 {else}
-        <div class="message">{str tag=nocollections section=collection}{if $addonelink}<a href={$addonelink}>{str tag=addone}</a>{/if}</div>
+        <div class="message">{str tag=nocollections section=collection}{if $addonelink} <a href={$addonelink}>{str tag=addone}</a>{/if}</div>
 {/if}
 {include file="footer.tpl"}