floating point exception status not inherited by exec

[Guy Harris]

>Hmm, I'm fairly sure that the "sticky bit" ordinarily refers to the bit in
>the file permissions which causes an executable to hang around in
>the swap space even when it's not in use.

I suspect he's referring to some other "sticky bit" (I seem to remember
that some schemes for doing floating-point arithmetic have something
called a "sticky bit").