fix bug with summaries, allow for social stuff to be blocked gracefully

src/scripts/browse.tag

@@ -253,10 +253,12 @@ self.addEls = () => {
   var summaries = document.getElementsByClassName("summary");
   for(var i = 0; i < summaries.length; i++) {
     var paragraphs = summaries[i].getElementsByTagName("p");
+    if (paragraphs.length > 0) {
       var paragraph = paragraphs[paragraphs.length-1];
       paragraph.textContent = paragraph.textContent+"…";
       paragraph.className = "blurmore";
     }
+  }
 };
 
 self.on("mount", () => {

src/scripts/post.tag

@@ -171,7 +171,9 @@ updatePost(postcontent) {
 
   self.parent.update();
 
+  if (self.refs.social.updateButton !== undefined) {
     self.refs.social.updateButton(self._id, self.title);
+  }
 
   self.one("updated", self.toTop);
   self.update();

src/scripts/social.tag

@@ -40,9 +40,9 @@ loadButtons() {
     }
   });
 
-  if (FB !== undefined && FB.XFBML !== undefined) {
+  if (window.FB !== undefined && window.FB.XFBML !== undefined) {
     if (self.refs.facebook !== undefined) {
-      FB.XFBML.parse(self.refs.facebook.root);
+      window.FB.XFBML.parse(self.refs.facebook.root);
     }
   }
   self.old_id = self._id;
@@ -57,6 +57,7 @@ test(ev) {
 }
 
 self.one("updated", () => {
+  if (!(window.FB == undefined && window.twttr == undefined)) {
     self.updateButton(self._id, self.title);
     self.update({"old_id" : self._id});
     self.one("updated", () => {
@@ -64,6 +65,7 @@ self.one("updated", () => {
         return self.old_id != self.parent._id;
       });
     });
+  }
 });
 
 </script>