When starting a gui program on windows stdout, stderr and stdin are not
connected to the cmd console. As a workaround tk has a console window.
Lets open this when the --trace commandline option has been given.
This is helpful for debugging.
Signed-off-by: Heiko Voigt <hvoigt@hvoigt.net> Signed-off-by: Pat Thoyts <patthoyts@users.sourceforge.net>