usp10: Check font for required features and report error if missing

[Aric Stewart]

---
  dlls/usp10/shape.c          |   98 
++++++++++++++++++++++++++++++++----------
  dlls/usp10/usp10.c          |    5 ++-
  dlls/usp10/usp10_internal.h |    1 +
  3 files changed, 79 insertions(+), 25 deletions(-)


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