feat(ops): support raw pointer arguments (#16826)

See https://github.com/denoland/deno/pull/16814#discussion_r1032744083.
Allows nullable buffers in low-level ops like FFI:

```rust
fn op_ffi_ptr_of<FP>(
  state: &mut OpState,
  buf: *const u8,
  out: &mut [u32],
) 
where
  FP: FfiPermissions + 'static {
  // ..
}
```

1 files changed, 2 insertions, 2 deletions

diff --git a/ext/ffi/lib.rs b/ext/ffi/lib.rs
index 3de204ef3..65d64af33 100644
--- a/ext/ffi/lib.rs
+++ b/ext/ffi/lib.rs
@@ -2065,7 +2065,7 @@ fn op_ffi_call_nonblocking<'scope>(
 #[op(fast)]
 fn op_ffi_ptr_of<FP>(
   state: &mut deno_core::OpState,
-  buf: &[u8],
+  buf: *const u8,
   out: &mut [u32],
 ) -> Result<(), AnyError>
 where
@@ -2084,7 +2084,7 @@ where
 
   // SAFETY: Out buffer was asserted to be at least large enough to hold a usize, and properly aligned.
   let out = unsafe { &mut *outptr };
-  *out = buf.as_ptr() as usize;
+  *out = buf as usize;
 
   Ok(())
 }