BFont::LoadFont can now use an index (0-based) and an optional named-instance (1-based)
to select the font variant from a file.
BFont::LoadFont can also use an index when loading from memory.
Change-Id: I0ce3eb6cc77d32cf43847416561eafe3063ca693
Reviewed-on: https://review.haiku-os.org/c/haiku/+/7402
Reviewed-by: Jérôme Duval <[email protected]>
Reviewed-by: Máximo Castañeda <[email protected]>
Tested-by: Commit checker robot <[email protected]>