"text%", "col%", "page%", "line%",
"theight%", "pheight%", "" };
-int const num_units = int(sizeof(unit_name) / sizeof(unit_name[0]));
+int const num_units = int(sizeof(unit_name) / sizeof(unit_name[0]) - 1);
// the latex units
char const * const unit_name_ltx[] = {