Alexandre Julliard : ole32: Cope with receiving WM_RENDERALLFORMATS even when the clipboard is empty.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 27a73216c04e512d848d3df36338f074437d86b4
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=27a73216c04e512d848d3df36338f074437d86b4

Author: Alexandre Julliard <julliard at winehq.org>
Date:   Thu Sep  1 22:01:44 2016 +0900

ole32: Cope with receiving WM_RENDERALLFORMATS even when the clipboard is empty.

Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/ole32/clipboard.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/dlls/ole32/clipboard.c b/dlls/ole32/clipboard.c
index 2cc1cfa..e3c93c9 100644
--- a/dlls/ole32/clipboard.c
+++ b/dlls/ole32/clipboard.c
@@ -2040,10 +2040,12 @@ static LRESULT CALLBACK clipbrd_wndproc(HWND hwnd, UINT message, WPARAM wparam,
     case WM_RENDERALLFORMATS:
     {
         DWORD i;
-        ole_priv_data_entry *entries = clipbrd->cached_enum->entries;
+        ole_priv_data_entry *entries;
 
         TRACE("(): WM_RENDERALLFORMATS\n");
 
+        if (!clipbrd || !clipbrd->cached_enum) break;
+        entries = clipbrd->cached_enum->entries;
         for(i = 0; i < clipbrd->cached_enum->count; i++)
         {
             if(entries[i].first_use)