client: Fix null output for ad service uuid

If getting the advertise service information without setting, outputs
null as UUID as below:

  [bluetooth]# service
  UUID: ((null))

Change-Id: I47ce8f6c380b90bf17acfa0db112bfc93b234e14
Signed-off-by: Amit Purwar <amit.purwar@samsung.com>

diff --git a/client/advertising.c b/client/advertising.c
index c9de177..1a6ffee 100644 (file)
--- a/client/advertising.c
+++ b/client/advertising.c
@@ -131,7 +131,7 @@ static void print_uuid(const char *uuid)
 
                bt_shell_printf("UUID: %s(%s)\n", str, uuid);
        } else
-               bt_shell_printf("UUID: (%s)\n", uuid);
+               bt_shell_printf("UUID: (%s)\n", uuid ? uuid : "");
 }
 
 static void print_ad_uuids(void)