Nim enum issue
Hello! I just recently picked up Nim and wanted to use glad for opengl bindings. When I import the gl.nim file though, I get this error. (Generated OpenGL 3.3 Core with "Generate a loader" checked.)

`gl.nim(107, 39) Error: -1 can't be converted to uint64`

I peeked at the code, and it's in the section dealing with opengl enums.