[Libguestfs] [PATCH nbdkit 0/2] Fix a couple of problems found by Coverity.

[Richard W.M. Jones]

There are a few other issues that Coverity found, but I believe
all can be ignored ... except one:

We don't set umask anywhere inside nbdkit.  Coverity complains that
this is a problem where we create temporary files, since the result of
mkstemp depends implicitly on the umask value.  I think we might
consider setting umask anyway (eg. to 022) just to make plugin
behaviour more predictable.  What do you think?

Rich.