Automatically built.

commit 75148ff545b8d95a82d8a0409b6a983804f0fa25
Merge: eb40c63 4a039ea
Author: Josh Lory <josh.lory@code.org>
Date:   Wed Nov 19 10:28:02 2014 -0800

    Merge pull request #490 from code-dot-org/wrapdraws

    Bounds-check drawImage calls (ensure positive width and non-negative offsets)

commit 4a039ea163ca28e2c1413d46ce6471bebde70548
Author: Josh Lory <josh.lory@code.org>
Date:   Wed Nov 19 10:23:11 2014 -0800

    Fix IndexSizeError when turtle is moving backwards

commit e77d1566923c6fd5dd02a7386c0785a5b86a1184
Author: Brendan Reville <brendan@code.org>
Date:   Wed Nov 19 09:28:01 2014 -0800

    Wrap drawImage calls to check that the image has a width (and therefore loaded).  Fixes IE.