lyxpreview2bitmap.sh error on grep -E on solaris

[Bo Peng]

Dear developers,

It took me a while to set up instant preview on solaris. One problem is 
that my grep does not have -E option so 

grep -E 'Preview: [ST]' ${LOGFILE} > ${METRICSFILE} ||
{
    echo "Failed: grep -E 'Preview: [ST]' ${LOGFILE}"
    REQUIRED_VERSION ${LOGFILE}
    BAIL_OUT
}

would fail. Deleting -E solves the problem.

-- 
Bo Peng