gdi32: load the vertical feature when loading the GSUB table

[Aric Stewart]

The vertical feature is the only one we care about (vert/vrt2). If the GSUB table does not have it then unload the GSUB table.
This should improve performance in the case where there is a vertical font with a GSUB table that does not have vertical features and with loading any glyph from a font with the feature.
---
 dlls/gdi32/freetype.c | 257 +++++++++++++++++++++++++++-----------------------
 1 file changed, 140 insertions(+), 117 deletions(-)


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