Handle the case where config['langs'] is undefined, since goog.array.isEmpty actually cannot handle a null or undefined "arr" param (which its docs say it can handle!).
Handle the case where config['langs'] is undefined, since
goog.array.isEmpty actually cannot handle a null or undefined "arr"
param (which its docs say it can handle!).

(This is a fix for a regression of bug 9299372, previously fixed in CL
47626591, so the description is the same, but the fix is in util.js
instead of initialize.js this time.)
-------------
Created by MOE: http://code.google.com/p/moe-java
MOE_MIGRATED_REVID=48039627

klokan/googlecrisismap,googlearchive/googlecrisismap,googlearchive/googlecrisismap,googlearchive/googlecrisismap,pnakka/googlecrisismap,googlearchive/googlecrisismap,klokan/googlecrisismap,pnakka/googlecrisismap,pnakka/googlecrisismap,klokan/googlecrisismap