BUG: misuse of the haveOutput variable in the python binding module

[jeankpf]

Describe the issue:

The variable haveInitFlow and haveOutput have been confused in the following line, resulting in the impossible initialisation of the flow with a python function without the entry output_function in the initialisation file. https://github.com/idefix-code/idefix/blob/a92732f3683af37bc3e55a9e8954867b1ae43967/src/pydefix.cpp#L136

Error message:

No response

runtime information:

Commit a92732f