oleaut32: Add validation for parameters in IPictureDisp::Invoke.

[Robert Shearman]

Add some tests for IPictureDisp::Invoke.
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  dlls/oleaut32/olepicture.c       |   37 +++++++++++++++++++++
  dlls/oleaut32/tests/olepicture.c |   66 
++++++++++++++++++++++++++++++++++++++
  2 files changed, 103 insertions(+), 0 deletions(-)
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