fixes crash in fastcgi plugin; do not process filters if there are noone
fixes crash in fastcgi plugin; do not process filters if there are noone

xzero/x0,christianparpart/x0,christianparpart/x0,xzero/x0,christianparpart/x0,christianparpart/x0,xzero/x0,xzero/x0,christianparpart/x0,christianparpart/x0,xzero/x0,xzero/x0,christianparpart/x0