Hans Leidekker : msi: Fix calculation of required buffer size in MsiSummaryInfoGetPropertyW.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: e58ebbf3e0e446375399558d93b7120082f34f22
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=e58ebbf3e0e446375399558d93...

Author: Hans Leidekker <hans(a)codeweavers.com>
Date:   Fri Oct 23 10:49:44 2009 +0200

msi: Fix calculation of required buffer size in MsiSummaryInfoGetPropertyW.

---

 dlls/msi/suminfo.c |    5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/dlls/msi/suminfo.c b/dlls/msi/suminfo.c
index d3db44a..df35c4d 100644
--- a/dlls/msi/suminfo.c
+++ b/dlls/msi/suminfo.c
@@ -607,9 +607,8 @@ static UINT get_prop( MSIHANDLE handle, UINT uiProperty, UINT *puiDataType,
 
             if( str->unicode )
             {
-                len = MultiByteToWideChar( CP_ACP, 0, prop->u.pszVal, -1,
-                                           str->str.w, *pcchValueBuf );
-                len--;
+                len = MultiByteToWideChar( CP_ACP, 0, prop->u.pszVal, -1, NULL, 0 ) - 1;
+                MultiByteToWideChar( CP_ACP, 0, prop->u.pszVal, -1, str->str.w, *pcchValueBuf );
             }
             else
             {