Set minimum screen brightness level to 1, not 0

locker/src/main.rs

@@ -118,6 +118,7 @@ fn main() -> anyhow::Result<()> {
             (command_handlers.restart_handler)(&mut screensaver, None)?;
         }
         let conn_fd = borrow_raw_fd(conn_fd);
+            
 
         let mut pfds = Vec::new();
         pfds.push(PollFd::new(borrow_raw_fd(signal_fd.as_raw_fd()), PollFlags::POLLIN));