Fixed adding post id to quote in chrome

boards/static/js/thread.js

@@ -138,12 +138,16 b' function showQuoteButton() {'
 
         var rect = window.getSelection().getRangeAt(0).getBoundingClientRect();
         var element = $(document.elementFromPoint(rect.x, rect.y));
-        var postParent = element.parents('.post');
-        if (postParent.length > 0) {
-            quoteButton.attr('data-post-id', postParent.attr('id'));
+        var postId = null;
+        if (element.hasClass('post')) {
+            postId = element.attr('id');
         } else {
-            quoteButton.attr('data-post-id', null);
+            var postParent = element.parents('.post');
+            if (postParent.length > 0) {
+                postId = postParent.attr('id');
+            }
         }
+        quoteButton.attr('data-post-id', postId);
     } else {
         quoteButton.hide();
     }