pytorch

1dcc034f - [caffe2] Avoid attempt to use undefined preprocessor directive

[caffe2] Avoid attempt to use undefined preprocessor directive Summary: This is somewhat more verbose, but it's more correct and addresses this warning on Visual Studio 2017: ``` xplat\caffe2\caffe2\core\common.h(76): warning C4067: unexpected tokens following preprocessor directive - expected a newline ``` Test Plan: Built locally with fix Reviewed By: simpkins Differential Revision: D28868632 fbshipit-source-id: f6a583e8275162adedb2a4bc5ed0f64847020871