- \setlength\mdfboxwidth{\wd\@tempboxa}%
- \setlength\mdfboxheight{\ht\@tempboxa+\dp\@tempboxa}%
- \setlength{\bc@invboxh}{\mdfboxheight}%
- \setlength{\mdfboundingboxheight}{%
- \mdfboxheight%
- +\mdf@innertopmargin@length%
- +\mdf@innerbottommargin@length%
-% +\mdf@middlelinewidth@length%
-% +\mdf@middlelinewidth@length%
- }%
+ \setlength\bc@mdfboxwidth{\wd\@tempboxa}%
+ \setlength\bc@mdfboxheight{\dimexpr\ht\@tempboxa+\dp\@tempboxa\relax}%
+ \setlength{\bc@invboxh}{\bc@mdfboxheight}%
+ \setlength{\mdfboundingboxheight}{\dimexpr\bc@mdfboxheight+\mdf@innertopmargin@length+\mdf@innerbottommargin@length\relax}%