Rather than ignoring any error return from getnewvnode() in nameiinit(), explicitly test and panic.  This should not ever happen, but if it does, this is a preferred failure mode to a NULL pointer dereference in kernel.
Rather than ignoring any error return from getnewvnode() in nameiinit(),
explicitly test and panic.  This should not ever happen, but if it does,
this is a preferred failure mode to a NULL pointer dereference in kernel.

Coverity CID:	1716
Found with:	Coverity Prevent(tm)

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase