[fractal] Redudant pattern matching removed

[Daniel Garcia Moreno <danigm src gnome org>]

commit 635eaf5295aef0a8ea57f93795f234b34dfeb325
Author: Günther Wagner <info gunibert de>
Date:   Wed Jun 17 08:05:53 2020 +0200

    Redudant pattern matching removed
    
    If the value of a destructured Result/Option is not used then it is more concise
    to use the is_* form for the if statement (is_err/is_none/is_ok/is_some)

 fractal-gtk/src/actions/message.rs | 2 +-
 fractal-gtk/src/appop/login.rs     | 4 ++--
 fractal-gtk/src/appop/member.rs    | 2 +-
 fractal-gtk/src/appop/room.rs      | 2 +-
 4 files changed, 5 insertions(+), 5 deletions(-)
---
diff --git a/fractal-gtk/src/actions/message.rs b/fractal-gtk/src/actions/message.rs
index 2f891829..841bf39e 100644
--- a/fractal-gtk/src/actions/message.rs
+++ b/fractal-gtk/src/actions/message.rs
@@ -169,7 +169,7 @@ pub fn new(
                         let window = upgrade_weak!(parent_weak, Continue(true));
                         if let Some(path) = save(&window, &name, &[]) {
                             // TODO use glib to copy file
-                            if let Err(_) = fs::copy(fname, path) {
+                            if fs::copy(fname, path).is_err() {
                                 ErrorDialog::new(false, &i18n("Couldn’t save file"));
                             }
                         }
diff --git a/fractal-gtk/src/appop/login.rs b/fractal-gtk/src/appop/login.rs
index aab14d11..d111ffe6 100644
--- a/fractal-gtk/src/appop/login.rs
+++ b/fractal-gtk/src/appop/login.rs
@@ -36,7 +36,7 @@ impl AppOp {
         server_url: Url,
         identity_url: Url,
     ) {
-        if let Err(_) = self.store_token(uid.clone(), access_token.clone()) {
+        if  self.store_token(uid.clone(), access_token.clone()).is_err() {
             error!("Can't store the token using libsecret");
         }
 
@@ -62,7 +62,7 @@ impl AppOp {
 
     pub fn bk_logout(&mut self) {
         self.set_rooms(vec![], true);
-        if let Err(_) = cache::get().destroy() {
+        if  cache::get().destroy().is_err() {
             error!("Error removing cache file");
         }
 
diff --git a/fractal-gtk/src/appop/member.rs b/fractal-gtk/src/appop/member.rs
index 3db71c32..2bc00c8b 100644
--- a/fractal-gtk/src/appop/member.rs
+++ b/fractal-gtk/src/appop/member.rs
@@ -160,7 +160,7 @@ impl AppOp {
         let uid_term = term.and_then(|t| UserId::try_from(t.as_str()).ok());
         // Adding a new user if the user
         if let Some(uid) = uid_term {
-            if let None = users.iter().find(|u| u.uid == uid) {
+            if users.iter().find(|u| u.uid == uid).is_none() {
                 let member = Member {
                     avatar: None,
                     alias: None,
diff --git a/fractal-gtk/src/appop/room.rs b/fractal-gtk/src/appop/room.rs
index f66aec7d..c1d6c720 100644
--- a/fractal-gtk/src/appop/room.rs
+++ b/fractal-gtk/src/appop/room.rs
@@ -455,7 +455,7 @@ impl AppOp {
         let uid = login_data.uid;
         let device_id = self.device_id.clone().unwrap_or_default();
 
-        if let Err(_) = cache::store(&rooms, since, username, uid, device_id) {
+        if cache::store(&rooms, since, username, uid, device_id).is_err() {
             error!("Error caching rooms");
         };
     }