lib/libnetgraph can't compile

[Matthew Dillon]

:Due to recent commits, lib/libnetgraph does not compile:
:===> lib/libnetgraph
:cc -O -pipe -mtune=pentiumpro -Wall  -c /usr/src/lib/libnetgraph/sock.c -o sock.o
:cc -O -pipe -mtune=pentiumpro -Wall  -c /usr/src/lib/libnetgraph/msg.c -o msg.o
:cc -O -pipe -mtune=pentiumpro -Wall  -c /usr/src/lib/libnetgraph/debug.c -o debug.o
:In file included from /usr/obj/usr/src/world_i386/usr/include/net/bpf.h:55,
:                 from /usr/src/lib/libnetgraph/debug.c:52:
:/usr/obj/usr/src/world_i386/usr/include/sys/mbuf.h:86: error: field `mh_netmsg' has incomplete type
:*** Error code 1
:
:Stop in /usr/src/lib/libnetgraph.
:*** Error code 1

    Fixed.  We might hit a few more of these as time passes.  Mostly they
    will be minor issues related to references to structures that are not
    included for non-kernel builds.

					-Matt
					Matthew Dillon 
					<dillon at xxxxxxxxxxxxx>