Thanks for the idea, but you dont have to change that simply set the configuration to "Release".
I need this in the "Debug" configuration to find out errors, so it'll stay in the source.
If you are in need of the Debug configuration then install the DirectX SDK.
In the future try registering on github and submitting a pull request its easier then it looks
Also the official precompiled binary release of the 1.6.2 version isn't that far away anymore it'll be on Tuesday or Monday.