now, one can do "script run mything.py" multiple times without
crashing, and exit codes are correct.
Pm3PyRun_SimpleFileNoExit:
* use XDECREF instead of DECREF (handles possible nullptr).
* don't double-free "er".
* print exit status correctly.
CmdScriptRun:
* allow invoking scripts multiple times.
* fix memleak of argtable contents if help path not triggered.
* configure_c_stdio should be 0 or 1, not < 0.
* py_conf: don't explicitly set options to their default values, it's confusing.
* Call Py_Finalize only when exiting pm3.
main_loop:
* cleanup cmdscript from main_loop. Important to call
Py_Finalize from here in case Qt is used (in which case
main_loop is on Qt thread).
ProxGuiQT::MainLoop:
* reduce timer delay to 0 - there isn't a need to wait here.
Shawn Hoffman