Fix new clippy warnings

Author: bilelmoussaoui

gdkwayland/src/wayland_window.rs

@@ -50,7 +50,7 @@ impl WaylandWindow {
         unsafe extern "C" fn destroy_notify<P: Fn(&WaylandWindow, &str) + 'static>(
             data: glib::ffi::gpointer,
         ) {
-            Box::from_raw(data as *mut _);
+            let _ = Box::from_raw(data as *mut _);
         }
         unsafe {
             from_glib(ffi::gdk_wayland_window_export_handle(

gtk/src/clipboard.rs

@@ -32,7 +32,7 @@ impl Clipboard {
             _clipboard: *mut ffi::GtkClipboard,
             user_data: gpointer,
         ) {
-            Box_::<F>::from_raw(user_data as *mut _);
+            let _ = Box_::<F>::from_raw(user_data as *mut _);
         }
         let stashed_targets: Vec<_> = targets.iter().map(|e| e.to_glib_none()).collect();
         let mut t = Vec::with_capacity(stashed_targets.len());
@@ -61,7 +61,7 @@ impl Clipboard {
         if !success {
             // Cleanup function is not called in case of a failure.
             unsafe {
-                Box_::<F>::from_raw(user_data as *mut _);
+                let _ = Box_::<F>::from_raw(user_data as *mut _);
             }
         }
         success

gtk/src/tree_sortable.rs

@@ -131,7 +131,7 @@ impl<O: IsA<TreeSortable>> TreeSortableExtManual for O {
         >(
             ptr: gpointer,
         ) {
-            Box::<F>::from_raw(ptr as *mut _);
+            let _ = Box::<F>::from_raw(ptr as *mut _);
         }
         unsafe {
             ffi::gtk_tree_sortable_set_default_sort_func(
@@ -187,7 +187,7 @@ impl<O: IsA<TreeSortable>> TreeSortableExtManual for O {
         >(
             ptr: gpointer,
         ) {
-            Box::<F>::from_raw(ptr as *mut _);
+            let _ = Box::<F>::from_raw(ptr as *mut _);
         }
         unsafe {
             ffi::gtk_tree_sortable_set_sort_func(