0008608: bogl-bterm blocks indefinitely when child program dies too fast

bterm (utf-8 console on raw vga16fb framebuffer console) may block indefinitely<br /> leaving the child process as a zombie, when program invoked under bterm<br /> terminates too quickly.<br /> <br /> This seems to be caused by the SIGCHLD delivered too early, when<br /> child_pid = fork();<br /> causes the child to run, all the way to termination before parent gets a timeslice,<br /> and SIGCHLD sent to parent, which is SIG_IGN -ed, as signal handler is still not installed.<br /> Parent may even not have chance to pick up the child_pid value!