Exception on empty Shape

[samreid]

A recent change to scenery causes this exception if I create a path with new Shape():
Uncaught Error: Assertion failed: Infinite bounds given to invalidateSelf

Should I be able to create a Shape/Path as an empty shape with new Shape()?

[samreid]

In discussion, @jonathanolson said: "I should probably assert( bounds.isEmpty() || bounds.isFinite() )".

I changed the assertion like you recommended and it seems like it solves the problem. Specifically, I changed the assertion that bounds x is finite and not NaN to: must be empty or finite. After this change, I tested qunit and 2516/2516 test passed (in Win8Chrome), so I will push to master.

[samreid]

Reassigned to @jonathanolson to verify my change set.

[samreid]

Do we also need to retain the test for NaN in the bounds? Also, the former test that was replaced just checked the x value for NaN (see 93b822f)

[jonathanolson]

isFinite( NaN ) is false, so this should work well. Changeset looks good.