config: check for empty ssid list

Without this check, an empty ssid list array results in a config with no nodes

Signed-off-by: Felix Fietkau <nbd@nbd.name>

diff --git a/local_node.c b/local_node.c
index 788fd99d623f9f4b8d3f49a02a4c88f8bd4c06e0..31c33779bca1a0f0c32fab75b4da8bb9493895c8 100644 (file)
--- a/local_node.c
+++ b/local_node.c
@@ -543,7 +543,7 @@ void config_set_ssid_list(struct blob_attr *data)
 
        free(config.ssid_list);
 
-       if (data)
+       if (data && blobmsg_len(data))
                config.ssid_list = blob_memdup(data);
        else
                config.ssid_list = NULL;