Bugfix complex abs for NaNs
Bugfix complex abs for NaNs

Hasimir/brython,Hasimir/brython,kikocorreoso/brython,Hasimir/brython,jonathanverner/brython,jonathanverner/brython,jonathanverner/brython,Hasimir/brython,jonathanverner/brython,kikocorreoso/brython,brython-dev/brython,brython-dev/brython,kikocorreoso/brython,brython-dev/brython