[PATCH 3/4] msi: Verify that the first parameter to Installer.OpenPackage is a VT_BSTR.

[James Hawkins]

It seems ugly to open up the parameters in pDispParams, but
DispGetParam will happily convert a VT_EMPTY to a VT_BSTR and not
return an error.

---
 dlls/msi/automation.c       |    2 ++
 dlls/msi/tests/automation.c |    4 ++--
 2 files changed, 4 insertions(+), 2 deletions(-)
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