Building errors and solutions on Windows about musly

[f0k]

Thank you for your report! First of all, is there a specific reason you need to build this with VS? The README file includes a guide for compiling with mingw: https://github.com/dominikschnitzer/musly#installation

Otherwise, your list is a mix of things we can or should change universally (const buffer_size, && instead of and, not defining uint8_t, #include <algorithm>), and things that are specific to VS (_USE_MATH_DEFINES, NOMINMAX). The latter would require some CMake magic to automatically add those defines if compiling with VS. Or actually, NOMINMAX should probably just be defined before include <windows.h>. Would you be willing to send a PR with the required changes to make it work in VS (without breaking compilation on Linux -- I can check that)?

About the BUILD_STATIC option, does #32 help?