clippy: is_some/none/ok/err/empty

Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>

src/api2/node/apt.rs

@@ -196,7 +196,7 @@ fn apt_get_changelog(
         }
     }, Some(&name));
 
-    if pkg_info.len() == 0 {
+    if pkg_info.is_empty() {
         bail!("Package '{}' not found", name);
     }
 

src/api2/node/tasks.rs

@@ -513,7 +513,7 @@ pub fn list_tasks(
         .collect();
 
     let mut count = result.len() + start as usize;
-    if result.len() > 0 && result.len() >= limit { // we have a 'virtual' entry as long as we have any new
+    if !result.is_empty() && result.len() >= limit { // we have a 'virtual' entry as long as we have any new
         count += 1;
     }