Do as the comment says it should do..

stupid me..

Change-Id: I5cd067a653641bb86e0a76f86f334781dbaef018
Reviewed-on: https://gerrit.libreoffice.org/59875Reviewed-by: Eike Rathke <erack@redhat.com>
Tested-by: Jenkins

tools/source/datetime/ttime.cxx

@@ -307,7 +307,7 @@ void tools::Time::GetClock( double fTimeInDays,
     if (fAbsTimeInDays >= 1.0)
     {
         const int nDig = static_cast<int>(ceil( log10( fAbsTimeInDays)));
-        nDec = std::max( std::min( nDig, 9), 2);
+        nDec = std::max( std::min( 10 - nDig, 9), 2);
     }
     double fSeconds = rtl::math::round( fRawSeconds, nDec);