[caffe2][c10] Fix signed/unsigned int64 mismatch (#71861)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/71861
The MSVC build has gotten rather verbose with warnings lately.
For example this comparison is meant to be int64 vs int64 like the one on the line prior to it, but adding an unsigned value (size_t) to int64_t returns unsigned. Cast this to make it consistent.
```
third-party\toolchains\vs2017_15.9\buildtools\vc\tools\msvc\14.16.27023\include\xstddef(322): warning C4018: '<=': signed/unsigned mismatch
xplat\caffe2\c10\util\logging.h(208): note: see reference to function template instantiation 'bool std::less_equal<void>::operator ()<const T1&,const T2&>(_Ty1,_Ty2) const' being compiled
with
[
T1=int64_t,
T2=unsigned __int64,
_Ty1=const int64_t &,
_Ty2=const unsigned __int64 &
]
xplat\caffe2\caffe2\queue\blobs_queue.cc(173): note: see reference to function template instantiation 'void c10::enforce_detail::enforceThatImpl<std::less_equal<void>,int64_t,unsigned __int64,>(Pred,const T1 &,const T2 &,const char *,int,const char *,const void *)' being compiled
with
[
Pred=std::less_equal<void>,
T1=int64_t,
T2=unsigned __int64
]
```
Test Plan: CI
Reviewed By: hyuen
Differential Revision: D33791102
fbshipit-source-id: 76caa02bed964ad6a82d7e698317cf1619d2d6d5
(cherry picked from commit 2742c478232081e05465670500f396bb3c52da4d)
