system() doesn't return a success code

[korli]

when using the attached test app in BeOS, system() returns 0. when using it in Haiku, system() returns -1

[korli]

test app

[jackburton]

our system() call does:

status_t returnValue; status_t error = wait_for_thread(thread, &returnValue); if (error != B_OK) {

errno = error; return -1;

} return returnValue;

Maybe we could just return B_OK instead. After all, the error check is already done before.

[korli]

we just continue to wait when a signal is received. fixed in r23439.