rustdesk: fix for rust 1.65

pkgs/applications/networking/remote/rustdesk/default.nix

···
     sha256 = "sha256-IlrfqwNyaSHE9Ct0mn7MUxEg7p1Ku34eOMYelEAYFW8=";
   };
 
+  patches = [
+    # based on https://github.com/rustdesk/rustdesk/pull/1900
+    ./fix-for-rust-1.65.diff
+  ];
+
   cargoSha256 = "sha256-1OMWEk+DerltF7kwdo4d04rbgIFLHBRq3vZaL7jtrdE=";
 
   LIBCLANG_PATH="${llvmPackages.libclang.lib}/lib";

pkgs/applications/networking/remote/rustdesk/fix-for-rust-1.65.diff

···
+diff --git a/libs/hbb_common/src/config.rs b/libs/hbb_common/src/config.rs
+index 74982de5..308bcf80 100644
+--- a/libs/hbb_common/src/config.rs
++++ b/libs/hbb_common/src/config.rs
+@@ -656,7 +656,7 @@ const PEERS: &str = "peers";
+ 
+ impl PeerConfig {
+     pub fn load(id: &str) -> PeerConfig {
+-        let _ = CONFIG.read().unwrap(); // for lock
++        let _lock = CONFIG.read().unwrap();
+         match confy::load_path(&Self::path(id)) {
+             Ok(config) => config,
+             Err(err) => {
+@@ -667,7 +667,7 @@ impl PeerConfig {
+     }
+ 
+     pub fn store(&self, id: &str) {
+-        let _ = CONFIG.read().unwrap(); // for lock
++        let _lock = CONFIG.read().unwrap();
+         if let Err(err) = confy::store_path(Self::path(id), self) {
+             log::error!("Failed to store config: {}", err);
+         }
+@@ -808,7 +808,7 @@ pub struct LanPeers {
+ 
+ impl LanPeers {
+     pub fn load() -> LanPeers {
+-        let _ = CONFIG.read().unwrap(); // for lock
++        let _lock = CONFIG.read().unwrap();
+         match confy::load_path(&Config::file_("_lan_peers")) {
+             Ok(peers) => peers,
+             Err(err) => {