Merge pull request #638 from JeromeLam/issue/#624

Issue/#624 - Add extra handling for negative activeIndex.

Author: Brian Feister

src/select.js

@@ -551,7 +551,7 @@
           break;
         case KEY.UP:
           if (!ctrl.open && ctrl.multiple) ctrl.activate(false, true); //In case its the search input in 'multiple' mode
-          else if (ctrl.activeIndex > 0 || (ctrl.search.length === 0 && ctrl.tagging.isActivated)) { ctrl.activeIndex--; }
+          else if (ctrl.activeIndex > 0 || (ctrl.search.length === 0 && ctrl.tagging.isActivated && ctrl.activeIndex > -1)) { ctrl.activeIndex--; }
           break;
         case KEY.TAB:
           if (!ctrl.multiple || ctrl.open) ctrl.select(ctrl.items[ctrl.activeIndex], true);
@@ -853,6 +853,10 @@
         throw uiSelectMinErr('choices', "Expected multiple .ui-select-choices-row but got '{0}'.", choices.length);
       }
 
+      if (ctrl.activeIndex < 0) {
+        return;
+      }
+
       var highlighted = choices[ctrl.activeIndex];
       var posY = highlighted.offsetTop + highlighted.clientHeight - container[0].scrollTop;
       var height = container[0].offsetHeight;
@@ -1329,4 +1333,3 @@
     };
   });
 }());
-