oleaut32: Fix the return code for an invalid dispid in IFontDisp::Invoke.

[Robert Shearman]

---
  dlls/oleaut32/olefont.c       |   12 +++++++-----
  dlls/oleaut32/tests/olefont.c |    6 ++++++
  2 files changed, 13 insertions(+), 5 deletions(-)
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