Actually set message flags

Braino. At least this would've just caused a slow memory leak. Nothing
to see here. Move along. ;)
Signed-off-by: Shawn Webb <shawn.webb@hardenedbsd.org>

libpushover/libpushover.c

@@ -116,6 +116,8 @@ pushover_init_message(pushover_message_t *msg)
 	if (msg == NULL)
 		return (NULL);
 
+	msg->psh_flags = flags;
+
 	return (msg);
 }