tools: Fix coding style when testing pointer

This patch fixes tools/gatt-service.c coding style, using !ptr instead
of ptr == NULL.

diff --git a/tools/gatt-service.c b/tools/gatt-service.c
index cba0ff3..ef479ed 100644 (file)
--- a/tools/gatt-service.c
+++ b/tools/gatt-service.c
@@ -139,7 +139,7 @@ static void register_external_service(gpointer a, gpointer b)
 
        msg = dbus_message_new_method_call("org.bluez", "/org/bluez",
                                        GATT_MGR_IFACE, "RegisterService");
-       if (msg == NULL) {
+       if (!msg) {
                printf("Couldn't allocate D-Bus message\n");
                return;
        }