chore: fix clippy truncation warnings in upload_gpu_patches

Signed-off-by: Alexander Droste <alexander.droste@protonmail.com>

Author: 0ax1

vortex-cuda/src/kernel/patches/types.rs

@@ -221,18 +221,19 @@ pub(crate) fn upload_gpu_patches(
     device_patches: &DevicePatches,
     ctx: &CudaExecutionCtx,
 ) -> VortexResult<(BufferHandle, u64)> {
-    #[expect(clippy::cast_possible_truncation)]
-    // Zero-initialize to avoid uninitialized padding bytes (e.g. between
-    // chunk_offset_type and indices) which would be UB when serialized.
+    // Zero-initialize to avoid uninitialized padding bytes.
     let mut gpu_patches: GPUPatches = unsafe { std::mem::zeroed() };
     gpu_patches.chunk_offsets = device_patches.chunk_offsets.cuda_device_ptr()? as _;
     gpu_patches.chunk_offset_type = ptype_to_chunk_offset_type(device_patches.chunk_offset_ptype)?;
     gpu_patches.indices = device_patches.indices.cuda_device_ptr()? as _;
     gpu_patches.values = device_patches.values.cuda_device_ptr()? as _;
-    gpu_patches.offset = device_patches.offset as u32;
-    gpu_patches.offset_within_chunk = device_patches.offset_within_chunk as u32;
-    gpu_patches.num_patches = device_patches.num_patches as u32;
-    gpu_patches.n_chunks = device_patches.n_chunks as u32;
+    #[expect(clippy::cast_possible_truncation)]
+    {
+        gpu_patches.offset = device_patches.offset as u32;
+        gpu_patches.offset_within_chunk = device_patches.offset_within_chunk as u32;
+        gpu_patches.num_patches = device_patches.num_patches as u32;
+        gpu_patches.n_chunks = device_patches.n_chunks as u32;
+    }
 
     // Serialize the repr(C) struct to bytes and upload to the device.
     let bytes = unsafe {