[main] simplify the main loop
[main] simplify the main loop

startup of ouistiti with &, closed the stdin descriptor. getc returned
-1 (EOF) all the time.

ouistiti-project/ouistiti,ouistiti-project/ouistiti,ouistiti-project/ouistiti,ouistiti-project/ouistiti,ouistiti-project/ouistiti,ouistiti-project/ouistiti