Path Error on Windows & gofmt error due to error generating type.

[vaiktorg]

Description

1. When generating wrappers in windows, go confuses "\" depending on the method used for getting the file name. This can be fixed with: preHeader := filepath.ToSlash(headerName) on line 361 of types/generate.go
2. As soon as this fix was done, gofmt throws an error saying it expects a symbol and found newline. Output as attachment. output.txt

Details

Go version	go1.11.5
Godot version	based on the output: /c/Users/*****/scoop/shims/godot (3.0.6
Godot-Go version/commit hash	1746202
OS	windows/amd64