fix conditionals in DayTimeDuration::stringValue()

Task-number: QTBUG-35479
Change-Id: If385bd85f5c20871a0248c828626deea2d72e0a2
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: Peter Hartmann <phartmann@blackberry.com>

src/xmlpatterns/data/qdaytimeduration.cpp

@@ -145,8 +145,7 @@ QString DayTimeDuration::stringValue() const
         retval.append(QLatin1Char('D'));
     }
 
-    if(!m_hours && !m_minutes && !m_seconds && !m_seconds)
-    {
+    if (!m_hours && !m_minutes && !m_seconds && !m_mseconds) {
         if(!m_days)
             return QLatin1String("PT0S");
         else
@@ -167,8 +166,7 @@ QString DayTimeDuration::stringValue() const
         retval.append(QLatin1Char('M'));
     }
 
-    if(m_seconds || m_seconds)
-    {
+    if (m_seconds || m_mseconds) {
         retval.append(QString::number(m_seconds));
 
         if(m_mseconds)