table frames no longer assume they are n levels below the inner table frame
table frames no longer assume their child frames are always the expected type of
frame. Now they check the display type and use that as sufficient proof that the frame
is of the right type. This implies a heavy reliance on the frame construction code to do
the right thing and always stamp out the right kind of frame for a given display type.
git-svn-id: svn://10.0.0.236/trunk@10922 18797224-902f-48f8-a5cc-f745e15eee43
0c00c9f654