Eliminate Date::operator+=() and -=() and replace with Date::AddDays()

Clarifies code and gets rid of explicitly casting the operand to sal_Int32.

Also in preparation of removing DateTime::operator+=(sal_Int32) that is
confusingly similar to DateTime::operator+=(double) and just depends on type.

Change-Id: I83422e2940fbb017978db9b5734b4966228af3de
Reviewed-on: https://gerrit.libreoffice.org/40248
Reviewed-by: Eike Rathke <erack@redhat.com>
Tested-by: Eike Rathke <erack@redhat.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/xmloff/source/core/xmluconv.cxx b/xmloff/source/core/xmluconv.cxx
index d65ad047c130..7aaa01c25d8e 100644
--- a/xmloff/source/core/xmluconv.cxx
+++ b/xmloff/source/core/xmluconv.cxx
@@ -321,7 +321,7 @@ void SvXMLUnitConverter::convertDateTime( OUStringBuffer& rBuffer,
     double fValue = fDateTime;
     sal_Int32 nValue = static_cast <sal_Int32> (::rtl::math::approxFloor (fValue));
     Date aDate (aTempNullDate.Day, aTempNullDate.Month, aTempNullDate.Year);
-    aDate += nValue;
+    aDate.AddDays( nValue);
     fValue -= nValue;
     double fCount;
     if (nValue > 0)
@@ -371,7 +371,7 @@ void SvXMLUnitConverter::convertDateTime( OUStringBuffer& rBuffer,
         if (fHoursValue >= 24.0)
         {
             fHoursValue -= 24.0;
-            aDate += 1;
+            aDate.AddDays(1);
         }
     }
     sal_Int16 nTempYear = aDate.GetYear();