[pbs-devel] [PATCH backup 02/13] remove redundant guards

[Maximiliano Sandoval]

Fixes the clippy lint:

```
warning: redundant guard
   --> pbs-datastore/src/chunk_store.rs:325:37
    |
325 |                     Err(ref err) if err == &nix::errno::Errno::ENOENT => {
    |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_guards
    = note: `#[warn(clippy::redundant_guards)]` on by default
help: try
    |
325 -                     Err(ref err) if err == &nix::errno::Errno::ENOENT => {
325 +                     Err(nix::errno::Errno::ENOENT) => {
    |
```

Signed-off-by: Maximiliano Sandoval <m.sandoval at proxmox.com>
---
 pbs-client/src/pxar/extract.rs         | 4 ++--
 pbs-datastore/src/chunk_store.rs       | 2 +-
 src/bin/proxmox_backup_manager/user.rs | 2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/pbs-client/src/pxar/extract.rs b/pbs-client/src/pxar/extract.rs
index af18ecfc..5f5ac618 100644
--- a/pbs-client/src/pxar/extract.rs
+++ b/pbs-client/src/pxar/extract.rs
@@ -699,7 +699,7 @@ impl Extractor {
         if result.seeked_last {
             while match nix::unistd::ftruncate(file.as_raw_fd(), size as i64) {
                 Ok(_) => false,
-                Err(errno) if errno == nix::errno::Errno::EINTR => true,
+                Err(nix::errno::Errno::EINTR) => true,
                 Err(err) => return Err(err).context("error setting file size"),
             } {}
         }
@@ -758,7 +758,7 @@ impl Extractor {
         if result.seeked_last {
             while match nix::unistd::ftruncate(file.as_raw_fd(), size as i64) {
                 Ok(_) => false,
-                Err(errno) if errno == nix::errno::Errno::EINTR => true,
+                Err(nix::errno::Errno::EINTR) => true,
                 Err(err) => return Err(err).context("error setting file size"),
             } {}
         }
diff --git a/pbs-datastore/src/chunk_store.rs b/pbs-datastore/src/chunk_store.rs
index fb282749..9f6289c9 100644
--- a/pbs-datastore/src/chunk_store.rs
+++ b/pbs-datastore/src/chunk_store.rs
@@ -322,7 +322,7 @@ impl ChunkStore {
                         // start reading:
                         continue;
                     }
-                    Err(ref err) if err == &nix::errno::Errno::ENOENT => {
+                    Err(nix::errno::Errno::ENOENT) => {
                         // non-existing directories are okay, just keep going:
                         continue;
                     }
diff --git a/src/bin/proxmox_backup_manager/user.rs b/src/bin/proxmox_backup_manager/user.rs
index 743c5d16..96b83fcc 100644
--- a/src/bin/proxmox_backup_manager/user.rs
+++ b/src/bin/proxmox_backup_manager/user.rs
@@ -16,7 +16,7 @@ fn render_expire(value: &Value, _record: &Value) -> Result<String, Error> {
         return Ok(never);
     }
     let text = match value.as_i64() {
-        Some(epoch) if epoch == 0 => never,
+        Some(0) => never,
         Some(epoch) => {
             if let Ok(epoch_string) = proxmox_time::strftime_local("%c", epoch) {
                 epoch_string
-- 
2.39.2