[PATCH v9 0/4] MR10673: oleaut32: Fix Null handling in three-valued logical ops.

[Francis De Brabandere (＠francisdb)]

VarAnd only inspected the non-Null operand one way and left V_BOOL/V_I4 uninitialized. VarImp treated VT_UI1 0xFF as VARIANT_TRUE (it isn't) and its VT_CY -1 check compared unscaled .int64 to -1 instead of -10000.

props to @jsm174 for this one: https://github.com/vpinball/libwinevbs/commit/7e877fafe34483623ca33d26ab76fd...

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  v9: oleaut32: Fix VT_DATE Null handling in VarImp.
      vbscript: Match native UI1 Imp Null behavior.
      oleaut32: Fix VT_CY Null handling in VarImp.
      oleaut32: Fix Null handling in VarAnd.
 
https://gitlab.winehq.org/wine/wine/-/merge_requests/10673