Fixed api methods returning post image

boards/views/api.py

@@ -134,10 +134,8 b' def api_get_threads(request, count):'
             'text': opening_post.text.rendered,
         }
         if opening_post.image:
-            post_json += {
-                'image': opening_post.image.url,
-                'image_preview': opening_post.image.url_200x150,
-            }
+            post_json['image'] = opening_post.image.url
+            post_json['image_preview'] = opening_post.image.url_200x150
         opening_posts.append(post_json)
 
     return HttpResponse(content=json.dumps(opening_posts))
@@ -180,10 +178,8 b' def api_get_thread_posts(request, openin'
             'text': post.text.rendered,
         }
         if post.image:
-            post_json += {
-                'image': post.image.url,
-                'image_preview': post.image.url_200x150,
-            }
+            post_json['image'] = post.image.url
+            post_json['image_preview'] = post.image.url_200x150
         json_post_list.append(post_json)
 
     return HttpResponse(content=json.dumps(json_post_list))