fixing typo/bug in applying a previous patch to SimpleZoom which wiped out a pair of parentheses
fixing typo/bug in applying a previous patch to SimpleZoom which wiped out a pair of parentheses

tommy-u/chaco,ContinuumIO/chaco,tommy-u/chaco,tommy-u/chaco,burnpanck/chaco,burnpanck/chaco,burnpanck/chaco,ContinuumIO/chaco,ContinuumIO/chaco,ContinuumIO/chaco