Resolves: tdf#123748 do not strip date part before calling Time::GetClock()

GetClock() needs it to properly scale and round the floating point
value. It also handles negative values, fiddling with that is only
needed for the [] formats.

Regression from

    commit e2e47898180e547cad7ccde1e5890385d573e551
    CommitDate: Fri Aug 31 12:50:52 2018 +0200

        Use tools::Time::GetClock() in number formatter for wall clock time

Change-Id: I05fe9e22886d4e59f110c0a826dadb43234d348a
Reviewed-on: https://gerrit.libreoffice.org/68508
Reviewed-by: Eike Rathke <erack@redhat.com>
Tested-by: Jenkins
diff --git a/svl/source/numbers/zformat.cxx b/svl/source/numbers/zformat.cxx
index 47f1942..db066e1 100644
--- a/svl/source/numbers/zformat.cxx
+++ b/svl/source/numbers/zformat.cxx
@@ -3000,7 +3000,7 @@ bool SvNumberformat::ImpGetTimeOutput(double fNumber,
{
    using namespace ::com::sun::star::i18n;
    bool bCalendarSet = false;
    double fNumberOrig = fNumber;
    const double fNumberOrig = fNumber;
    bool bRes = false;
    bool bSign = false;
    if (fNumber < 0.0)
@@ -3020,10 +3020,6 @@ bool SvNumberformat::ImpGetTimeOutput(double fNumber,
            return false;
        }
    }
    else
    {
        fNumber -= floor(fNumber); // Else truncate date
    }
    bool bInputLine;
    sal_Int32 nCntPost;
    if ( rScan.GetStandardPrec() == SvNumberFormatter::INPUTSTRING_PRECISION &&
@@ -3037,10 +3033,6 @@ bool SvNumberformat::ImpGetTimeOutput(double fNumber,
        bInputLine = false;
        nCntPost = rInfo.nCntPost;
    }
    if (bSign && !rInfo.bThousand) // No [] format
    {
        fNumber = 1.0 - fNumber; // "Inverse"
    }

    OUStringBuffer sSecStr;
    sal_Int32 nSecPos = 0; // For figure by figure processing
@@ -3049,7 +3041,7 @@ bool SvNumberformat::ImpGetTimeOutput(double fNumber,
    {
        sal_uInt16 nCHour, nCMinute, nCSecond;
        double fFractionOfSecond;
        tools::Time::GetClock( fNumber, nCHour, nCMinute, nCSecond, fFractionOfSecond, nCntPost);
        tools::Time::GetClock( fNumberOrig, nCHour, nCMinute, nCSecond, fFractionOfSecond, nCntPost);
        nHour = nCHour;
        nMin = nCMinute;
        nSec = nCSecond;