[gf, pk] Resolve *glyph jumping* error.

* src/gf/gfdrivr.c(GF_Load_Glyph): Modify glyph metric values
to resolve the *glyph jumping* error and make the glyphs to
properly sit on baseline.

* src/pk/pkdrivr.c(PK_Glyph_Load): Ditto.
2 files changed