user32/listbox: Don't set any data for LBS_NODATA listboxes.

dlls/user32/listbox.c

@@ -2692,7 +2692,7 @@ LRESULT ListBoxWndProc_common( HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam
             SetLastError(ERROR_INVALID_INDEX);
             return LB_ERR;
         }
-        descr->items[wParam].data = lParam;
+        if (!(descr->style & LBS_NODATA)) descr->items[wParam].data = lParam;
         /* undocumented: returns TRUE, not LB_OKAY (0) */
         return TRUE;
 

dlls/user32/tests/listbox.c

@@ -2104,13 +2104,10 @@ static void test_LBS_NODATA(void)
 
     /* More messages that don't work with LBS_NODATA. */
     ret = SendMessageA(listbox, LB_FINDSTRING, 1, 42);
-todo_wine
     ok(ret == LB_ERR, "Unexpected return value %d.\n", ret);
     ret = SendMessageA(listbox, LB_FINDSTRINGEXACT, 1, 42);
-todo_wine
     ok(ret == LB_ERR, "Unexpected return value %d.\n", ret);
     ret = SendMessageA(listbox, LB_SELECTSTRING, 1, 42);
-todo_wine
     ok(ret == LB_ERR, "Unexpected return value %d.\n", ret);
 
     DestroyWindow(listbox);