Fixed a bug for getting notification events
Fixed a bug for getting notification events

* ArrayIndexOutOfBoundsException can be occurred if a user's notifications are smaller then
the size of notifications to get.
* This prevents the exception and the user will not see error page.

oolso/yobi,ihoneymon/yobi,Limseunghwan/oss,oolso/yobi,bloodybear/yona,oolso/yobi,bloodybear/yona,doortts/forked-for-history,naver/yobi,doortts/fork-yobi,brainagenet/yobi,brainagenet/yobi,ihoneymon/yobi,bloodybear/yona,naver/yobi,yona-projects/yona,Limseunghwan/oss,doortts/forked-for-history,ahb0327/yobi,doortts/fork-yobi,doortts/fork-yobi,bloodybear/yona,doortts/forked-for-history,ahb0327/yobi,ihoneymon/yobi,doortts/fork-yobi,yona-projects/yona,yona-projects/yona,yona-projects/yona,brainagenet/yobi,naver/yobi,ahb0327/yobi,Limseunghwan/oss