minor, fix reloadTableExtAt NPE
Project: http://git-wip-us.apache.org/repos/asf/kylin/repo
Commit: http://git-wip-us.apache.org/repos/asf/kylin/commit/0547a7ca
Tree: http://git-wip-us.apache.org/repos/asf/kylin/tree/0547a7ca
Diff: http://git-wip-us.apache.org/repos/asf/kylin/diff/0547a7ca
minor, fix reloadTableExtAt NPE
Project: http://git-wip-us.apache.org/repos/asf/kylin/repo
Commit: http://git-wip-us.apache.org/repos/asf/kylin/commit/0547a7ca
Tree: http://git-wip-us.apache.org/repos/asf/kylin/tree/0547a7ca
Diff: http://git-wip-us.apache.org/repos/asf/kylin/diff/0547a7ca