gdi32: Properly handle negative font widths

[Felix Nawothnig]

Fixes #3685. Oh, and the test passed on XP SP2 of course.
---
  dlls/gdi32/freetype.c   |    2 +-
  dlls/gdi32/tests/font.c |    4 ++--
  2 files changed, 3 insertions(+), 3 deletions(-)
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