Prevent window from being created by python ct2ctml subprocess
Prevent window from being created by python ct2ctml subprocess

When using Cantera from a GUI app, the python process was inheriting
window settings from the parent, and launching in a window that didn't
accept input from the calling process, causing the conversion to fail.


imitrichev/cantera,Heathckliff/cantera,imitrichev/cantera,Heathckliff/cantera,imitrichev/cantera,Heathckliff/cantera,Heathckliff/cantera,Heathckliff/cantera,Heathckliff/cantera,imitrichev/cantera,imitrichev/cantera,imitrichev/cantera