Fix bug in assignable property propagation
Fix bug in assignable property propagation

It was not implemented for arrays and tuples, so tuples of GMP
expression did not compile right.

artas360/pythran,serge-sans-paille/pythran,pbrunet/pythran,pbrunet/pythran,pombredanne/pythran,hainm/pythran,artas360/pythran,pbrunet/pythran,serge-sans-paille/pythran,hainm/pythran,hainm/pythran,pombredanne/pythran,artas360/pythran,pombredanne/pythran