SVN r355491 breaks libprocstat

[Michael Butler]

This member removal has other consequences. As follows ..

--- lib/libprocstat__L ---
Building /usr/obj/usr/src/amd64.amd64/lib/libprocstat/smbfs.o
--- libprocstat.o ---
/usr/src/lib/libprocstat/libprocstat.c:620:29: error: no member named
'next' in 'struct vm_map_entry'
                for (entryp = map->header.next;
                              ~~~~~~~~~~~ ^
/usr/src/lib/libprocstat/libprocstat.c:622:24: error: no member named
'next' in 'struct vm_map_entry'
                    entryp = vmentry.next) {
                             ~~~~~~~ ^
2 errors generated.

	imb