oleaut32: Added a preliminary test, for scale overflow, in VarDecCmp.

[Christopher Cope]

This fixes Bug #31269 <http://bugs.winehq.org/show_bug.cgi?id=31269>.

---
  dlls/oleaut32/tests/vartype.c |    2 +-
  dlls/oleaut32/vartype.c       |   33 ++++++++++++++++++++++++++++++++-
  2 files changed, 33 insertions(+), 2 deletions(-)
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