equality checking in recycleNodesInto.js

[chungwong]

These 3 lines were added at efd18d6 to fix read only property warning.

Given that
[1] == [1] evaluates false, this checking will fail on arrays which means the 3-line guard added will not work on arrays and will trigger

Uncaught TypeError: Cannot assign to read only property 'foo' of object '#<Object>'

[alloy]

This is essentially a duplicate of #2049 and PR #2193 already exists to address it.

@jstejada This can be closed.