remove len == 0 check, the index root is always '\0'

diff --git a/udev/udev-rules.c b/udev/udev-rules.c
index 796d2c157fa6eccbf20c21ac3acd3bcdccd90956..df9fc7877da2c2d7bfa46f0ebb81e5a7b9d0f5da 100644 (file)
--- a/udev/udev-rules.c
+++ b/udev/udev-rules.c
@@ -451,15 +451,10 @@ static int add_string(struct udev_rules *rules, const char *str)
        unsigned int off;
        struct trie_node *parent;
 
-       len = strlen(str);
-
-       /* offset 0 is always '\0' */
-       if (len == 0)
-               return 0;
-
        /* walk trie, start from last character of str to find matching tails */
-       node_idx = 0;
+       len = strlen(str);
        key = str[len-1];
+       node_idx = 0;
        for (depth = 0; depth <= len; depth++) {
                struct trie_node *node;
                unsigned int child_idx;
@@ -1723,7 +1718,7 @@ struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
        if (rules->trie_nodes == NULL)
                return NULL;
        rules->trie_nodes_max = PREALLOC_TRIE;
-       /* offset 0 is the trie root */
+       /* offset 0 is the trie root, with an empty string */
        memset(rules->trie_nodes, 0x00, sizeof(struct trie_node));
        rules->trie_nodes_cur = 1;