Editor: Memory and textures are leaked when the composition is modified while running.

[jmcc (Jean Marie)]

Steps causing the bug to occur

1. Using a node like Place Image in Scene and modifying it can cause a leak.

How did the result differ from what you expected?

Compositions should not leak.

Other notes

• Vuo version: 0.5.0

[jstrecker (Jaymie)]

Fixed in Vuo 1.2.4.