codebrowser: Fix NPE when showing a directory.
codebrowser: Fix NPE when showing a directory.

doortts/forked-for-history,bloodybear/yona,ChangsungKim/TestRepository01,naver/yobi,ihoneymon/yobi,bloodybear/yona,yona-projects/yona,violetag/demo,brainagenet/yobi,ahb0327/yobi,ihoneymon/yobi,bloodybear/yona,Limseunghwan/oss,ahb0327/yobi,Limseunghwan/oss,oolso/yobi,brainagenet/yobi,ahb0327/yobi,doortts/fork-yobi,Limseunghwan/oss,doortts/fork-yobi,doortts/fork-yobi,yona-projects/yona,doortts/fork-yobi,ihoneymon/yobi,yona-projects/yona,oolso/yobi,brainagenet/yobi,naver/yobi,doortts/forked-for-history,naver/yobi,ChangsungKim/TestRepository01,yona-projects/yona,oolso/yobi,violetag/demo,doortts/forked-for-history,bloodybear/yona