(arrow) branch main updated: GH-38556: [C++] Add missing explicit size_t cast for i386 (#38557)

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The following commit(s) were added to refs/heads/main by this push:
     new 9a364b8ea9 GH-38556: [C++] Add missing explicit size_t cast for i386 (#38557)
9a364b8ea9 is described below

commit 9a364b8ea955097f6cd5721fd9a42606b7d83b08
Author: Sutou Kouhei <ko...@clear-code.com>
AuthorDate: Mon Nov 6 17:31:01 2023 +0900

    GH-38556: [C++] Add missing explicit size_t cast for i386 (#38557)
    
    ### Rationale for this change
    
    We need explicit cast for `int64_t` to `size_t` conversion for i386 environment.
    
    This was introduced by GH-37792.
    
    ### What changes are included in this PR?
    
    Add explicit cast.
    
    ### Are these changes tested?
    
    Yes.
    
    ### Are there any user-facing changes?
    
    No.
    * Closes: #38556
    
    Authored-by: Sutou Kouhei <ko...@clear-code.com>
    Signed-off-by: Sutou Kouhei <ko...@clear-code.com>
---
 cpp/src/arrow/array/data.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cpp/src/arrow/array/data.cc b/cpp/src/arrow/array/data.cc
index 678513fd4d..186682be30 100644
--- a/cpp/src/arrow/array/data.cc
+++ b/cpp/src/arrow/array/data.cc
@@ -568,7 +568,7 @@ std::shared_ptr<ArrayData> ArraySpan::ToArrayData() const {
 util::span<const std::shared_ptr<Buffer>> ArraySpan::GetVariadicBuffers() const {
   DCHECK(HasVariadicBuffers());
   return {buffers[2].data_as<std::shared_ptr<Buffer>>(),
-          buffers[2].size / sizeof(std::shared_ptr<Buffer>)};
+          static_cast<size_t>(buffers[2].size) / sizeof(std::shared_ptr<Buffer>)};
 }
 
 bool ArraySpan::HasVariadicBuffers() const {