From e952ab4100826a5ff2e36efe71d5d6b8d49df2b2 Mon Sep 17 00:00:00 2001
From: Eugene OZ <normandiggs@gmail.com>
Date: Tue, 30 Dec 2014 22:57:56 +0300
Subject: [PATCH] fix(tabs): pagination only call watcher() when it's a
 function

Fix for #1072. Closes #1073.
---
 src/components/tabs/js/paginationDirective.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/components/tabs/js/paginationDirective.js b/src/components/tabs/js/paginationDirective.js
index 68e341a78b3..d51353d975f 100644
--- a/src/components/tabs/js/paginationDirective.js
+++ b/src/components/tabs/js/paginationDirective.js
@@ -102,7 +102,9 @@ function TabPaginationDirective($mdConstant, $window, $$rAF, $$q, $timeout, $mdM
             function () {
               $timeout(function () {
                 if (element[0].offsetParent) {
-                  watcher();
+                  if (angular.isFunction(watcher)) {
+                    watcher();
+                  }
                   debouncedUpdatePagination();
                   watcher = null;
                 }