Fix warnings link

Author: m-aciek

template.html.jinja

@@ -50,7 +50,7 @@
     {% if project.translators.link %}</a>{% endif %}
   </td>
   <td data-label="warnings">
-    {% if completion %}<a href="warnings-{{ project.language.code }}.txt">{{ project.warnings }}</a>{% else %}{{ project.warnings }}{% endif %}
+    {% if project.completion %}<a href="warnings-{{ project.language.code }}.txt">{{ project.warnings }}</a>{% else %}{{ project.warnings }}{% endif %}
   </td>
   <td data-label="completion">
     <div class="progress-bar" style="width: {{ project.completion }}%;">{{ "{:.2f}".format(project.completion) }}%</div>