Fixed image counting. Optimized image count.

boards/models.py

@@ -240,11 +240,7 b' class Post(models.Model):'
 
     def get_images_count(self):
         images_count = 1 if self.image else 0
-
-        # TODO Use query here
-        for reply in self.replies:
-            if reply.image:
-                images_count += 1
+        images_count += self.replies.filter(image_width__gt=0).count()
 
         return images_count