Can't convert unsafe.Pointer to int

unsafe.go

func getPixel(surface *sdl.Surface, x, y int) uint32 {
	var bpp uint8 = surface.Format.BytesPerPixel
	/* Here p is the address to the pixel we want to retrieve */
	var p *uint32 = *uint32(int(surface.Pixels) + y*int(surface.Pitch) + x*bpp)
	return *p

	return 1 /* shouldn't happen, but avoids warnings */

}