No border drawn for a 1x1 rectangle

[jpkoskela]

Version

2.4.2

Test Case

http://jsfiddle.net/jpkoskela/zLh2d6y7/

Information about environment

All browsers.

Steps to reproduce

Add a 1x1 rectangle with 0.1 stroke width to canvas. Zoom in.

Expected Behavior

Border should be rendered for the 1x1 rectangle.

Actual Behavior

Rendering of border is optimized away.

Source of Problem

rect.class.js

 _render: function(ctx) {

      // optimize 1x1 case (used in spray brush)
      if (this.width === 1 && this.height === 1) {
        ctx.fillRect(-0.5, -0.5, 1, 1);
        return;
      }
```

[asturur]

you are right. This optimization was for the spray brush. i think since we have caching we should remove it.
Do you want to do it with a PR?