[master] 32574ab46 vsm: Pass VARNISH_DEFAULT_N to VSM_Arg()

[Nils Goroll]

I still don't get it.

1d7cdadda changed this in, I think, a wrong way, and now we add another wrong 
place. The default should be set for vut->n_arg. The default should be set for 
wd->wdname in VSM_Init(). What is the problem with that?

Nils