Image getting and checking last replies optimizations.

boards/templates/boards/posting_general.html

@@ -27,7 +27,7 b''
             {% else %}
 		        <div class="post dead_post" id="{{ thread.thread.id }}">
             {% endif %}
-            {% if thread.thread.image %}
+            {% if thread.thread.image.exists %}
                 <div class="image">
                     <a class="fancy"
                        href="{{ thread.thread.image.url }}"><img
@@ -75,7 +75,7 b''
                 {% endif %}
             </div>
             </div>
-            {% if thread.thread.get_last_replies %}
+            {% if thread.thread.get_last_replies.exists %}
                 <div class="last-replies">
                     {% for post in thread.thread.get_last_replies %}
                         {% if thread.bumpable %}
@@ -83,7 +83,7 b''
                         {% else %}
 			                <div class="post dead_post" id="{{ post.id }}">
                         {% endif %}
-                            {% if post.image %}
+                            {% if post.image.exists %}
                                 <div class="image">
                                     <a class="fancy"
                                        href="{{ post.image.url }}"><img

boards/templates/boards/thread.html

@@ -10,7 +10,7 b''
 
 {% block content %}
 
-	{% if posts %}
+	{% if posts.exists %}
         <div id="posts">
 		{% for post in posts %}
             {% if bumpable %}
@@ -18,7 +18,7 b''
             {% else %}
                 <div class="post dead_post" id="{{ post.id }}">
             {% endif %}
-            {% if post.image %}
+            {% if post.image.exists %}
                 <div class="image">
                     <a
                             class="fancy"