Bugzilla bug 229293: fixed compiler warning "unary minus operator applied to unsigned type". r=relyea,jpierre.
Bugzilla bug 229293: fixed compiler warning "unary minus operator applied
to unsigned type". r=relyea,jpierre.

thespooler/nss,thespooler/nss,thespooler/nss,thespooler/nss,thespooler/nss,thespooler/nss,thespooler/nss