glib: Silence a new clippy warning that requires Rust 1.65

error: casting the result of `from_raw_parts` to *const [u8]
   --> glib/src/variant_type.rs:140:16
    |
140 |             &*(slice::from_raw_parts(self.ptr.as_ptr() as *const u8, self.len) as *const [u8]
    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `core::ptr::slice_from_raw_parts(self.ptr.as_ptr() as *const u8, self.len)`
    |
    = note: `-D clippy::cast-slice-from-raw-parts` implied by `-D warnings`
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_slice_from_raw_parts

error: casting the result of `from_raw_parts` to *const [u8]
   --> glib/src/variant_type.rs:456:12
    |
456 |         &*(slice::from_raw_parts(ptr as *const u8, len) as *const [u8] as *const VariantTy)
    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `core::ptr::slice_from_raw_parts(ptr as *const u8, len)`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_slice_from_raw_parts

Author: sdroege

glib/src/variant_type.rs

@@ -135,6 +135,8 @@ impl Clone for VariantType {
 
 impl Deref for VariantType {
     type Target = VariantTy;
+
+    #[allow(clippy::cast_slice_from_raw_parts)]
     fn deref(&self) -> &VariantTy {
         unsafe {
             &*(slice::from_raw_parts(self.ptr.as_ptr() as *const u8, self.len) as *const [u8]
@@ -449,6 +451,7 @@ impl VariantTy {
     /// Creates `&VariantTy` with a wildcard lifetime from a `GVariantType`
     /// pointer.
     #[doc(hidden)]
+    #[allow(clippy::cast_slice_from_raw_parts)]
     pub unsafe fn from_ptr<'a>(ptr: *const ffi::GVariantType) -> &'a VariantTy {
         assert!(!ptr.is_null());
         let len = ffi::g_variant_type_get_string_length(ptr) as usize;