user32: avoid NULL pointer access in DefWindowProcA WM_NCCREATE

[Jan Zerebecki]

---
If this patch is rejected from inclusion, please tell me why, as
I would have to ask anyway.

 dlls/user32/defwnd.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/dlls/user32/defwnd.c b/dlls/user32/defwnd.c
index fda2dc9..16f89d4 100644
--- a/dlls/user32/defwnd.c
+++ b/dlls/user32/defwnd.c
@@ -777,7 +777,7 @@ LRESULT WINAPI DefWindowProcA( HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam
             CREATESTRUCTA *cs = (CREATESTRUCTA *)lParam;
             /* check for string, as static icons, bitmaps (SS_ICON, SS_BITMAP)
              * may have child window IDs instead of window name */
-            if (HIWORD(cs->lpszName))
+            if (cs && HIWORD(cs->lpszName))
                 DEFWND_SetTextA( hwnd, cs->lpszName );
             result = 1;
         }