tree db7460ce53036dbe963745f751b1f446b80cdb39
parent cd48dbcf4a910569c3904fb83d99043e5b895320
author Barret Rhoden <brho@cs.berkeley.edu> 1490812709 -0400
committer Barret Rhoden <brho@cs.berkeley.edu> 1490812891 -0400

devroot: Use dirtab's length instead of rootdata's size

There were two mechanisms tracking the size of an object in #root - the
dirtab's length and the rootdata's size fields.  We didn't always keep them
in sync, and we really only need one.

I also removed the sizep field - it wasn't clear that it was used for
anything other than the rootinit() attempt to keep the length and size in
sync.

Signed-off-by: Barret Rhoden <brho@cs.berkeley.edu>