Make node equivalence inherently sort by width
Make node equivalence inherently sort by width

If nodes are part of a Graph that does not have a "width" attribute,
there will be no sorting and no error.

Signed-off-by: Teodor-Dumitru Ene <2853baffc346a14b7885b2637a7ab7a41c2198d9@gmail.com>

tdene/synth_opt_adders