[PATCH 2/4] vbscript: Implemented Sgn(try 6)

[Shuai Meng]

testbot:
   https://newtestbot.winehq.org/JobDetails.pl?Key=7843
Change log:
   Fixed a wrong indention;
   Changed the return value when V_VT(arg) == VT_NULL;
---
  dlls/vbscript/global.c      | 55 
+++++++++++++++++++++------------------------
  dlls/vbscript/tests/api.vbs | 31 +++++++++++++++++++++++++
  dlls/vbscript/vbscript.h    |  1 +
  3 files changed, 58 insertions(+), 29 deletions(-)


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