fuse_io* must be able to crunch also VDIR vnodes. Update assert appropriately.
fuse_io* must be able to crunch also VDIR vnodes.
Update assert appropriately.

Reported and Tested by:	flo
MFC after:	2 months
X-MFC:		241519,242536

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