Hans Leidekker : wbemprox: Fix corner cases in IEnumWbemClassObject::Skip.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 2c5da008f7a8a1772e6c41a371c41c8fd2eb2950
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=2c5da008f7a8a1772e6c41a371c41c8fd2eb2950

Author: Hans Leidekker <hans at codeweavers.com>
Date:   Wed Jul 25 13:12:42 2012 +0200

wbemprox: Fix corner cases in IEnumWbemClassObject::Skip.

---

 dlls/wbemprox/class.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/dlls/wbemprox/class.c b/dlls/wbemprox/class.c
index 5bd9c1c..af7d8f5 100644
--- a/dlls/wbemprox/class.c
+++ b/dlls/wbemprox/class.c
@@ -167,7 +167,9 @@ static HRESULT WINAPI enum_class_object_Skip(
 
     if (lTimeout != WBEM_INFINITE) FIXME("timeout not supported\n");
 
-    if (ec->index + nCount >= view->count)
+    if (!view->count) return WBEM_S_FALSE;
+
+    if (nCount > view->count - ec->index)
     {
         ec->index = view->count - 1;
         return WBEM_S_FALSE;