[PATCH STABLE] alias: do not crash when aliased command has no usage help text

[Henrik Stuart]

Nicolas Dumazet wrote:
> # HG changeset patch
> # User Nicolas Dumazet <nicdumz.commits at gmail.com>
> # Date 1259817284 -32400
> # Node ID d4737e35527c847bbd86091f846403560f764b97
> # Parent  e97dd3a8e8d70450dce7b0a0dc8d420ea1d0bbc3
> alias: do not crash when aliased command has no usage help text

In crew as 8bce1e0d2801. Thanks.

-- 
Kind regards,
  Henrik Stuart