xgb backend problem

[Commod0re]

I'm currently migrating an application I'm working on from go-ui to go.uik

I discovered an issue while building on Linux, and the fixes are simple (incorrect and missing casts)

I got the following errors when trying to build:

../../github.com/skelterjohn/go.wde/xgb/icon.go:57: cannot use width (type int) as type uint in field value
../../github.com/skelterjohn/go.wde/xgb/icon.go:58: cannot use height (type int) as type uint in field value
../../github.com/skelterjohn/go.wde/xgb/icon.go:59: cannot use data (type []int) as type []uint in field value

so I changed the function SetIcon like so:

func (w *Window) SetIcon(icon image.Image) {
    width := icon.Bounds().Max.X - icon.Bounds().Min.X
    height := icon.Bounds().Max.Y - icon.Bounds().Min.Y
    data := make([]uint, width*height)
    for x := 0; x < width; x++ {
        for y := 0; y < height; y++ {
            i := x + y*width
            c := icon.At(x, y)
            r, g, b, a := c.RGBA()
            data[i] = uint(a + r<<8 + g<<16 + b<<24)
        }
    }
    wmicon := ewmh.WmIcon{
        Width:  uint(width),
        Height: uint(height),
        Data:   data,
    }
    ewmh.WmIconSet(w.xu, w.win.Id, []ewmh.WmIcon{wmicon})
}

and it now builds and runs properly.