[C++] MSVC issues warning building PyArrow on Windows

[asfimport]

https://ci.appveyor.com/project/ApacheSoftwareFoundation/arrow/builds/39448469/job/96ja5h1b984ln09d

While it doesn't block anything, there's a warning (looks like because a parameter was misdeclared in the pxd file):

[33/36] Building CXX object CMakeFiles\_compute.dir\_compute.cpp.obj
_compute.cpp(18101): warning C4244: 'argument': conversion from 'int64_t' to 'uint32_t', possible loss of data

Reporter: David Li / @lidavidm
Assignee: David Li / @lidavidm

PRs and other links:

• GitHub Pull Request #10447

_{Note: This issue was originally created as ARROW-12961. Please see the migration documentation for further details.}

[asfimport]

yibocai#1:
Issue resolved by pull request 10447
#10447