fix 2 small bugs

hourglass/client/main/main.html

@@ -32,10 +32,13 @@
             </div>
         </div>
         <div id="classListHolder">
-        <h3>Enrolled</h3><h3 id="calCreWork">{{calCreWork}}</h3>
-            {{#each myClasses}}
-                {{> sidebarClasses}}  
-            {{/each}}
+        {{#if myClasses}}
+
+            <h3>Enrolled</h3><h3 id="calCreWork">{{calCreWork}}</h3>
+                {{#each myClasses}}
+                    {{> sidebarClasses}}  
+                {{/each}}
+        {{/if}}
         </div>
     </div>
     <div id="optionsContainer" style="margin-right:{{optionsStatus}};background-color:{{divColor 'sidebar'}}">
@@ -152,4 +155,4 @@
             <span class="cWorkDate">{{dueDate}}</span>
         </div>
     </div>
-</template>
+</template>

hourglass/server/main.js

@@ -449,11 +449,12 @@ Meteor.methods({
             found !== null &&
             pass === found.code &&
             prof.classes.indexOf(change) === -1) {
+            foundsubs = found.subscribers + '';
             classes.update({
                 _id: found._id
             }, {
                 $set: {
-                    subscribers: found.subscribers.concat(Meteor.userId())
+                    subscribers: foundsubs.concat(Meteor.userId())
                 }
             });
             var current = Meteor.user().profile;