[Fontconfig] Did You Know That FT_Done_Face Can Return An Error?

[Lawrence D'Oliveiro]

I notice that Fontconfig ignores possible error returns from
FT_Done_Face and FT_Done_FreeType (cf src/fcdir.c, src/fcfreetype.c).

Would you say this was wise? There seems to be a difference of opinion
on the FreeType list
<http://lists.nongnu.org/archive/html/freetype/2018-05/threads.html>
about it.