Fix: Wrong Cycles NanoVDB memory alignment on Windows

This was not a problem in practice so far, but will be with upcoming changes.

Pull Request: https://projects.blender.org/blender/blender/pulls/132908

intern/cycles/device/cpu/device_impl.cpp

@@ -103,7 +103,7 @@ void CPUDevice::mem_alloc(device_memory &mem)
     }
 
     if (mem.type == MEM_DEVICE_ONLY) {
-      size_t alignment = MIN_ALIGNMENT_CPU_DATA_TYPES;
+      size_t alignment = MIN_ALIGNMENT_DEVICE_MEMORY;
       void *data = util_aligned_malloc(mem.memory_size(), alignment);
       mem.device_pointer = (device_ptr)data;
     }

intern/cycles/device/device.cpp

@@ -513,7 +513,7 @@ void *Device::get_guiding_device() const
 
 void *Device::host_alloc(const MemoryType /*type*/, const size_t size)
 {
-  return util_aligned_malloc(size, MIN_ALIGNMENT_CPU_DATA_TYPES);
+  return util_aligned_malloc(size, MIN_ALIGNMENT_DEVICE_MEMORY);
 }
 
 void Device::host_free(const MemoryType /*type*/, void *host_pointer, const size_t size)

intern/cycles/util/aligned_malloc.h

@@ -10,6 +10,8 @@ CCL_NAMESPACE_BEGIN
 
 /* Minimum alignment needed by all CPU native data types (SSE, AVX). */
 #define MIN_ALIGNMENT_CPU_DATA_TYPES 16  // NOLINT
+/* NanoVDB needs at least 32 byte alignment. */
+#define MIN_ALIGNMENT_DEVICE_MEMORY 32  // NOLINT
 
 /* Allocate block of size bytes at least aligned to a given value. */
 void *util_aligned_malloc(const size_t size, const int alignment);