[Libguestfs] [PATCH] Fix error handling in 'zero' function.

The zero command is quite broken (along error paths). You must call reply_with_{,p}error along every error path. This patch fixes it. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones libguestfs lets you edit virtual machines. Supports shell scripting, bindings from many languages. http://et.redhat.com/~rjones/libguestfs/ See what it can do: http://et.redhat.com/~rjones/libguestfs/recipes.html