removed filter form if no results

rowers/templates/virtualevent.html

@@ -242,6 +242,8 @@
     {{ coursescript|safe }}
 
     </p>
+
+    {% if form %}
     <p>
     <h2>Filter Results</h2>
 
@@ -253,6 +255,7 @@
     {% csrf_token %}
     <input class="button green" type="submit" value="Submit">
     </p>
+    {% endif %}
   </div>
 </div>