Aric Stewart : msctf: Correct handling if NULL for pdimFocus in ITfThreadMgr::SetFocus.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: ae51d05d780ae118001e01ab270d0c49ce98a8f1
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=ae51d05d780ae118001e01ab270d0c49ce98a8f1

Author: Aric Stewart <aric at codeweavers.com>
Date:   Mon Aug 31 14:48:40 2009 -0500

msctf: Correct handling if NULL for pdimFocus in ITfThreadMgr::SetFocus.

---

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

diff --git a/dlls/msctf/threadmgr.c b/dlls/msctf/threadmgr.c
index 9fb1b5d..4b21b56 100644
--- a/dlls/msctf/threadmgr.c
+++ b/dlls/msctf/threadmgr.c
@@ -389,7 +389,9 @@ static HRESULT WINAPI ThreadMgr_SetFocus( ITfThreadMgr* iface, ITfDocumentMgr *p
 
     TRACE("(%p) %p\n",This,pdimFocus);
 
-    if (!pdimFocus || FAILED(IUnknown_QueryInterface(pdimFocus,&IID_ITfDocumentMgr,(LPVOID*) &check)))
+    if (!pdimFocus)
+        check = NULL;
+    else if (FAILED(IUnknown_QueryInterface(pdimFocus,&IID_ITfDocumentMgr,(LPVOID*) &check)))
         return E_INVALIDARG;
 
     ITfThreadMgrEventSink_OnSetFocus((ITfThreadMgrEventSink*)&This->ThreadMgrEventSinkVtbl, check, This->focus);