don't use deprecated api of KUser

svn path=/trunk/KDE/kdegraphics/okular/; revision=720663

conf/okular.kcfg

@@ -220,7 +220,7 @@
   <entry key="IdentityAuthor" type="String">
     <code>
       KUser currentUser;
-      QString userString = currentUser.fullName();
+      QString userString = currentUser.property( KUser::FullName ).toString();
       if ( userString.isEmpty() )
       {
         userString = currentUser.loginName();

ui/pageviewannotator.cpp

@@ -685,7 +685,7 @@ void PageViewAnnotator::setEnabled( bool on )
     {
         // get default username from the kdelibs/kdecore/KUser
         KUser currentUser;
-        QString userName = currentUser.fullName();
+        QString userName = currentUser.property( KUser::FullName ).toString();
         // ask the user for confirmation/change
         bool firstTry = true;
         while ( firstTry || userName.isEmpty()  )