[paint] Change back return type of paint_glyph() to void Add new "_or_fail" variants of draw_glyph and paint_glyph New API: +hb_font_draw_glyph_or_fail_func_t +hb_font_paint_glyph_or_fail_func_t +hb_font_funcs_set_draw_glyph_or_fail_func() +hb_font_funcs_set_paint_glyph_or_fail_func() +hb_font_draw_glyph_or_fail() +hb_font_paint_glyph_or_fail() Deprecated API: -hb_font_draw_glyph_func_t -hb_font_paint_glyph_func_t -hb_font_funcs_set_draw_glyph_func() -hb_font_funcs_set_paint_glyph_func()