64-bit safety.
 [rsc] --rw-rw-r-- M 320859 glenda sys 9509 Oct 27 10:40 sys/src/cmd/9nfs/nfs.c
	/n/sourcesdump/2005/1027/plan9/sys/src/cmd/9nfs/nfs.c:138,144 - 
	/n/sourcesdump/2005/1028/plan9/sys/src/cmd/9nfs/nfs.c:138,144
	  		dp->uid = xf->uid;
	  		dp->gid = xf->uid;
	  		dp->muid = xf->uid;
	- 		dp->qid.path = (ulong)xf->uid;
	+ 		dp->qid.path = (uvlong)xf->uid;
	  		dp->qid.type = QTFILE;
	  		dp->qid.vers = 0;
	  		dp->mode = 0666;