this scoping detracts from readability

Change-Id: I99a51bf68ef1c98e4023413b9274c4361f8a9b96
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/122797
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
diff --git a/connectivity/source/commontools/dbconversion.cxx b/connectivity/source/commontools/dbconversion.cxx
index cae8470..6a2e211 100644
--- a/connectivity/source/commontools/dbconversion.cxx
+++ b/connectivity/source/commontools/dbconversion.cxx
@@ -333,12 +333,9 @@ namespace dbtools
    css::util::Time DBTypeConversion::toTime(const double dVal, short nDigits)
    {
        const double nDays = std::trunc(dVal);
        sal_Int64 nNS;
        {
            double fSeconds((dVal - nDays) * (fNanoSecondsPerDay / nanoSecInSec));
            fSeconds = ::rtl::math::round( fSeconds, nDigits );
            nNS = fSeconds * nanoSecInSec;
        }
        double fSeconds((dVal - nDays) * (fNanoSecondsPerDay / nanoSecInSec));
        fSeconds = ::rtl::math::round(fSeconds, nDigits);
        sal_Int64 nNS = fSeconds * nanoSecInSec;

        sal_Int16 nSign;
        if ( nNS < 0 )