Incorrect vertBearingY for CFF fonts

[Eric Muller]

In cff/cffgload.c, at the end, in the function cff_slot_load: The 
bearings are set early on from calls to a get_metrics() font method. 
Those values are in font design units. Then towards the end of the 
cff_slot_load, there is a call to FT_Outline_Get_CBox, that retrieves 
the glyph bbox in scaled units. That sets horiBearing{X,Y} and 
vertBearingX but vertBearingY is left alone, and is not scaled. In the 
"if (has_vertical_info)" that sets metrics->vertBearingX, there should 
be a scaling of vertBearingY, e.g. "metrics->vertBearingY = FT_MulFix 
(metrics->vertBearingY, glyph->y_scale);"

Eric.