Zhang Boyang faca60df76 font: Reject fonts with negative max_char_width or max_char_height
If max_char_width or max_char_height are negative wrong values can be propagated
by grub_font_get_max_char_width() or grub_font_get_max_char_height(). Prevent
this from happening.

Signed-off-by: Zhang Boyang <zhangboyang.id@gmail.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
2023-01-10 16:06:03 +01:00
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