Change MountPoint fields to using c_ulong since that's what libmount uses

src/mounts.rs

@@ -5,16 +5,17 @@ use std::io::Read;
 use std::path::{Path, PathBuf};
 
 use libmount::mountinfo::Parser;
+use libc::c_ulong;
 
 use crate::errors::Error;
 use crate::utils;
 
 #[derive(Debug)]
 pub struct MountPoint {
-    pub mount_id: u64,
-    pub parent_id: u64,
-    pub major: u64,
-    pub minor: u64,
+    pub mount_id: c_ulong,
+    pub parent_id: c_ulong,
+    pub major: c_ulong,
+    pub minor: c_ulong,
     pub root: PathBuf,
     pub mount_point: PathBuf,
 }