Detect deleted member correctly

templates/sora/active_threads.html

@@ -16,7 +16,7 @@
     <div class="row">
       {% for thread in row %}{% if thread %}
       <div class="span6">
-        <img src="{% if thread.start_post_id %}{{ thread.start_poster.get_avatar(36) }}{% else %}{{ macros.avatar_guest(24) }}{% endif %}" class="avatar tooltip-top" title="{% trans username=thread.start_poster_name %}Thread started by {{ username }}{% endtrans %}">
+        <img src="{% if thread.start_poster_id %}{{ thread.start_poster.get_avatar(36) }}{% else %}{{ macros.avatar_guest(24) }}{% endif %}" class="avatar tooltip-top" title="{% trans username=thread.start_poster_name %}Thread started by {{ username }}{% endtrans %}">
         <p class="title">
           <a href="{% url 'thread' thread=thread.pk, slug=thread.slug %}" class="hover-opacity tooltip-top" title="{% trans %}Jump to thread start{% endtrans %}"><i class="icon-asterisk"></i></a>
           <a href="{% url 'thread_last' thread=thread.pk, slug=thread.slug %}" class="jump jump-last tooltip-top" title="{% trans %}Jump to latest reply{% endtrans %}"><strong>{{ thread.name }}</strong></a>

templates/sora/watched.html

@@ -27,7 +27,7 @@
   <li id="watch-{{ loop.index }}">
     <div class="row">
       <div class="span7">
-        <img src="{% if thread.start_post_id %}{{ thread.start_poster.get_avatar(36) }}{% else %}{{ macros.avatar_guest(24) }}{% endif %}" class="avatar tooltip-top" title="{% trans username=thread.start_poster_name %}Thread started by {{ username }}{% endtrans %}">
+        <img src="{% if thread.start_poster_id %}{{ thread.start_poster.get_avatar(36) }}{% else %}{{ macros.avatar_guest(24) }}{% endif %}" class="avatar tooltip-top" title="{% trans username=thread.start_poster_name %}Thread started by {{ username }}{% endtrans %}">
         <p class="title">
           <a href="{% url 'thread' thread=thread.pk, slug=thread.slug %}" class="hover-opacity tooltip-top" title="{% trans %}Jump to thread start{% endtrans %}"><i class="icon-asterisk"></i></a>
           {% if not thread.is_read -%}