At the moment, we do our own null checks before calling ubus_free().
The likely-hood of 'ctx' being null (in ubus_free()) is low, 
but since free() handles null, might make sense for ubus_free() to do so as 
well.

Signed-off-by: Alexandru Ardelean <ardeleana...@gmail.com>
---
 libubus.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libubus.c b/libubus.c
index ccaa069..88a6ad3 100644
--- a/libubus.c
+++ b/libubus.c
@@ -354,6 +354,8 @@ struct ubus_context *ubus_connect(const char *path)
 void ubus_shutdown(struct ubus_context *ctx)
 {
        blob_buf_free(&b);
+       if (!ctx)
+               return;
        close(ctx->sock.fd);
        free(ctx->msgbuf.data);
 }
-- 
2.1.4
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