correctly filter out selected options out of elements loaded by infinite scroll. fixes #881

select2.js

@@ -1317,7 +1317,8 @@ the specific language governing permissions and limitations under the Apache Lic
 
 
                     self.opts.populateResults.call(this, results, data.results, {term: term, page: page, context:context});
-
+                    self.postprocessResults(data);
+                            
                     if (data.more===true) {
                         more.detach().appendTo(results).text(self.opts.formatLoadMore(page+1));
                         window.setTimeout(function() { self.loadMoreIfNeeded(); }, 10);