From cb618d6718a45dde886c08473ebf8360d8ae0a51 Mon Sep 17 00:00:00 2001
From: Manvesh Vyas <manvesh@gmail.com>
Date: Thu, 26 Oct 2017 16:40:12 -0700
Subject: [PATCH] Fix scenario where expandedRowHeights[expandedOffset] is
 undefined.

---
 src/directives/apMesa.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/directives/apMesa.js b/src/directives/apMesa.js
index ca6c3d0..b116ea2 100644
--- a/src/directives/apMesa.js
+++ b/src/directives/apMesa.js
@@ -372,7 +372,7 @@
           runningTotalScroll += rowsHeight;
 
           // the pixels that this row's expanded panel displaces
-          var expandedPixels = scope.transientState.expandedRowHeights[expandedOffset];
+          var expandedPixels = scope.transientState.expandedRowHeights[expandedOffset] || 0;
           runningTotalScroll += expandedPixels;
           rowOffset = expandedOffset;
 
@@ -383,7 +383,7 @@
           }
         }
 
-        scope.transientState.rowOffset = Math.max(0, rowOffset);
+        scope.transientState.rowOffset = Math.max(0, rowOffset || 0);
 
         scrollDeferred.resolve();