SeExpr is an embeddable, arithmetic expression language that enables flexible artistic control and customization in creating computer graphics images. Example uses include procedural geometry synthesis, image synthesis, simulation control, crowd animation, and geometry deformation. https://wdas.github.io/SeExpr
When building on Windows, there were lots of warnings related to implicit type conversions + some warnings about non-secure calls (such as getenv)
This commit fixes those warnings, at least for the main SeExpr2 library.