Fix computation of max total width for container cells in wxHTML

We could end up with 0 max total width because we could assign the value
of the child max total width, which could have been 0, just because the
child "width", which is actually the total available width for the
container cells (and a child of a container cell can, of course, be
another container cell), was greater than our own total width so far.

This is confusing because it might be expected that "width" is always
less than "max total width", but actually this is (almost) never the
case for the container cells.

Closes #10263.

src/html/htmlcell.cpp

@@ -824,8 +824,9 @@ void wxHtmlContainerCell::Layout(int w)
             if (curLineWidth > m_MaxTotalWidth)
                 m_MaxTotalWidth = curLineWidth;
 
-            if (wxMax(cell->GetWidth(), cell->GetMaxTotalWidth()) > m_MaxTotalWidth)
+            if (cell->GetMaxTotalWidth() > m_MaxTotalWidth)
                 m_MaxTotalWidth = cell->GetMaxTotalWidth();
+
             curLineWidth = 0;
         }
         else