fix for letting ad_banner display even when file in not uploaded

app/assets/stylesheets/widget.css

@@ -58,7 +58,7 @@
 	cursor: pointer;
 }
 .select-role {
-	display:none;
+	display:none;
 	padding: 10px 0;
 }
 .file-upload {

app/views/admin/ad_banners/_ad_image_update.html.erb

@@ -1,5 +1,5 @@
 <li class="span3" id = 'asd'>
-			<%= image_tag ad_image.file %> 
+			<%= image_tag ad_image.file rescue nil%> 
 			<p>
 				<%= ad_image.display? ? '[Showing]' : '[NotShawing]' %>
 				<%= "#{ad_image.post_date ||'NeedReset'  }~#{ad_image.unpost_date || 'NeedReset'}" %>