Handle SetCursor(NULL)

[Günther Brammer]

This fixes Bug 881.

diff --git a/dlls/user32/cursoricon.c b/dlls/user32/cursoricon.c
index 7c197ed..90d5af1 100644
--- a/dlls/user32/cursoricon.c
+++ b/dlls/user32/cursoricon.c
@@ -1462,8 +1462,9 @@ HCURSOR WINAPI SetCursor( HCURSOR hCursor /* [in] Handle of cursor to show */ )
     struct user_thread_info *thread_info = get_user_thread_info();
     HCURSOR hOldCursor;
 
-    if (hCursor == thread_info->cursor) return hCursor;  /* No change */
-    TRACE("%p\n", hCursor);
+    if (hCursor && hCursor == thread_info->cursor) return hCursor;  /* No change */
+    TRACE("%p (was %p)\n", hCursor, thread_info->cursor);
+	
     hOldCursor = thread_info->cursor;
     thread_info->cursor = hCursor;
     /* Change the cursor shape only if it is visible */

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