msi: Do not use type value if call to RegQueryValueEx failed.

[Misha Koshelev]

This is necessary (bug not sufficient, see my comment in the bug report that I am about
to post) to fix bug 8678.

It is also clearly correct, as checking the type "returned" by RegQueryValueEx when it fails
makes no sense.

---
 dlls/msi/action.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
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