geometry bounds should be cleared while using path handler

[pgiraud]

Since r7546, the tests are failing in IE6. In this revision, we introduced code that calls geometry.getBounds(). This way, the geometry bounds property is cached. Therefore, it's not kept up to date when user draws a path with the path handler.

[pgiraud]

Ok, after a quick investigation, it first seems like the unit test doesn't reflect the reality. In the path handler test, the line is drawn with the following actions :

• mousedown then mouseup on a location,
• then mousedown and up on an other location.

The problem is that we didn't trigger any mousemove event.

[ahocevar]

I can confirm that the patch fixes the tests.

[pgiraud]

(In [7552]) handlers test are not reflecting the reality, we now simulate a click, move then click \n that way geometry bounds are cleared, and the tests don't fail in IE6 anymore (See #1602), r=ahocevar,crschmidt (Closes #1623)