array recursion too complex

maglev raises ArgumentError for this (not very comlex :) ) example:
ar1 = [1, 3]
ar2 = [ar1, 2]
ar1 == ar2 # -> raises error, though it should return false

I've taken this line out, but I'm not sure, whether the MagLev-Tests will pass without it.

p.s: i've closed the other pull request #217, because the were changes not intended for the master branch