Correct message for anonymous suggestion

html/translate.html

@@ -54,7 +54,11 @@
 {% for suggestion in suggestions %}
 <tr><td class="translatetext">{{ suggestion.target|fmttranslation }}</td></tr>
 <tr><td>
+{% if suggestion.user %}
 {% blocktrans with suggestion.user.get_full_name as user %}Suggested by {{ user }}{% endblocktrans %}
+{% else %}
+{% trans "Suggested by anonymous user" %}
+{% endif %}
 {% if user.is_authenticated %}
 <div class="suggestionactions">
 <a href="{{ suggestion.get_translate_url }}?type={{ type }}&amp;oldpos={{ unit.position }}&amp;accept={{ suggestion.id }}" class="sug-accept">Accept</a>