Fixed segfault when requesting non-existant parent window

diff --git a/libchimara/window.c b/libchimara/window.c
index 011b5fbf99ee6859f45940d1ba82ddf14452d5ee..56cbd700e6d66f2a5d9b2f496073a18fcf91eb05 100644 (file)
--- a/libchimara/window.c
+++ b/libchimara/window.c
@@ -170,7 +170,11 @@ winid_t
 glk_window_get_parent(winid_t win)
 {
        VALID_WINDOW(win, return NULL);
+
        /* Value will also be NULL if win is the root window */
+       if(win->window_node->parent == NULL)
+               return NULL;
+
        return (winid_t)win->window_node->parent->data;
 }