fix issue with nan's comparison in py_float
fix issue with nan's comparison in py_float

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