[CSS22] Change to baseline of 'inline-block' in the presence of 'over…

…flow' (see changes#s.10.8.1)

css2/visudet.src

@@ -1523,10 +1523,15 @@ of the tops of the boxes in the subtree, and the bottom is analogous.
 <p>The baseline of an 'inline-table' is the baseline of the first row
 of the table.
 </p>
-<p>The baseline of an 'inline-block' is the baseline of its last line
-box in the normal flow, unless it has either no in-flow line boxes or
-if its 'overflow' property has a computed value other than 'visible',
-in which case the baseline is the bottom margin edge.</p>
+<p>The baseline of an 'inline-block’ whose ‘overflow’ property has a
+computed value of ‘visible’ is the baseline of its last line box in
+the normal flow, unless it has no in-flow line boxes, in which case
+the baseline is the bottom margin edge. The baseline of an
+inline-block whose ‘overflow’ property has a computed value not equal
+to ‘visible’ is the higher of either its bottom margin edge or the
+baseline of its last line box in the normal flow, unless it has no
+in-flow line boxes, in which case its baseline is the baseline is the
+bottom margin edge.</p>
 </body>
 </html>