configfile.c: Ignore registered undefined config keys.

If a registered config key equals NULL, it is now ignored. Before, this would
cause a segfault. As this has happened a few times in the past, we not handle
it sanely.

diff --git a/src/configfile.c b/src/configfile.c
index b1030fe..bb57ca2 100644 (file)
--- a/src/configfile.c
+++ b/src/configfile.c
@@ -155,7 +155,8 @@ static int cf_dispatch (const char *type, const char *orig_key,
 
        for (i = 0; i < cf_cb->keys_num; i++)
        {
-               if (strcasecmp (cf_cb->keys[i], key) == 0)
+               if ((cf_cb->keys[i] != NULL)
+                               && (strcasecmp (cf_cb->keys[i], key) == 0))
                {
                        ret = (*cf_cb->callback) (key, value);
                        break;