Do not make useless copies in tuple constructor
Do not make useless copies in tuple constructor

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