another author picture fix

app/views/comment/components/comment-review.pug

@@ -4,7 +4,7 @@ mixin renderCommentReview (comment)
     header.uk-comment-header
       div(uk-grid).uk-grid-medium.uk-flex-middle
         .uk-width-auto
-          if comment.author.picture.small
+          if comment.author.picture && comment.author.picture.small
             img(src= `/image/${comment.author.picture.small._id}`).site-profile-picture.sb-small.uk-comment-avatar
           else
             img(src="/img/default-member.png").site-profile-picture.sb-small.uk-comment-avatar