fix(collectionRepeat): when array is empty, dont use heightGetter/widthGetter

Closes #3440.

Author: ajoslin

Diff for: js/angular/directive/collectionRepeat.js

@@ -496,8 +496,14 @@ function RepeatManagerFactory($rootScope, $window, $$rAF) {
     var isLayoutReady = false;
     var isDataReady = false;
     this.refreshLayout = function(itemsAfterRepeater) {
-      estimatedHeight = heightGetter(0, data[0]);
-      estimatedWidth = widthGetter(0, data[0]);
+      if (data.length) {
+        estimatedHeight = heightGetter(0, data[0]);
+        estimatedWidth = widthGetter(0, data[0]);
+      } else {
+        // If we don't have any data in our array, just guess.
+        estimatedHeight = 100;
+        estimatedWidth = 100;
+      }
 
       // Get the size of every element AFTER the repeater. We have to get the margin before and
       // after the first/last element to fix a browser bug with getComputedStyle() not counting