fixes #651 Pull request I participate - empty for some cases

fixed wrong if condition

rhodecode/templates/admin/users/user_edit_my_account_pullrequests.html

@@ -25,7 +25,7
 
 <div class="pullrequests_section_head" style="clear:both">${_('I participate in')}</div>
 <ul>
-    %if c.my_pull_requests:
+    %if c.participate_in_pull_requests:
       %for pull_request in c.participate_in_pull_requests:
       <li>
         <div style="height: 12px">