Add initial Xinerama support

[wmpus] / util.c

diff --git a/util.c b/util.c
index a91d1bdc329d151ee9dad33ec7c1df34fd15c3ee..7425be00fa41ab37cd3437ad01204633c808be7d 100644 (file)
--- a/util.c
+++ b/util.c
@@ -30,7 +30,7 @@ void list_insert_after(list_t *prev, void *data)
 list_t *list_append(list_t *head, void *data)
 {
        list_t *last = head;
-       while (last->next)
+       while (last && last->next)
                last = last->next;
        list_t *node = new0(list_t);
        node->data = data;
@@ -57,6 +57,14 @@ int list_length(list_t *node)
        return len;
 }
 
+list_t *list_find(list_t *list, void *data)
+{
+       for (list_t *cur = list; cur; cur = cur->next)
+               if (cur->data == data)
+                       return cur;
+       return NULL;
+}
+
 /* Misc */
 int error(char *fmt, ...)
 {