diagnostic tool fixes

ui/mainwindow/viewport.go

@@ -13,7 +13,7 @@ type ViewPort struct {
 
 func NewViewPort(x, y, w, h int) *ViewPort {
 	vp := ViewPort{
-		Rect:  types.Rect{x, y, w, h},
+		Rect:  types.Rect{X: x, Y: y, W: w, H: h},
 	}
 	return &vp
 }
@@ -47,8 +47,8 @@ func (vp *ViewPort) ToVPCoords(c types.Coords) (newCoords types.Coords, err erro
 	//coords on map to coords on vp
 	x, y := c.X-vp.CameraCoords.X, c.Y-vp.CameraCoords.Y
 	if x < 0 || y < 0 || x > vp.W || y > vp.H {
-		return types.Coords{-1, -1}, fmt.Errorf("Not in viewport: {%d, %d}", x, y)
+		return types.Coords{X: -1, Y: -1}, fmt.Errorf("Not in viewport: {%d, %d}", x, y)
 	}
-	return types.Coords{x, y}, nil
+	return types.Coords{X: x, Y: y}, nil
 }