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long TTF_FontFaces(TTF_Font *font)
Get the number of faces ("sub-fonts") available in the loaded font.
This is a count of the number of specific fonts (based on size and style and other typographical features perhaps)
contained in the font itself. It seems to be a useless fact to know, since it can't
be applied in any other SDL_ttf functions.
NOTE: Passing a NULL font into this function will cause a segfault.
Returns: The number of faces in the font.