In core-font mode, a nested table's cells lose a font family equal to the table's default #667

In core-font mode ('mode' => 'c'), a nested table's cells lose a font family equal to the table's default. #648 notes that this applies to the nested table's own font-family too, in both cssModes.

SetFont() returns early without recording currentfontfamily, so the text is buffered with no family. It is then drawn in whatever font is current when the outer cell is printed.

UTF-8 mode is not affected.

Found in #648. Related: #539.