Removed chained appends in SvxAuthorField, as part of Bug 57950.

Change-Id: Id23139b9bdd7897178a013d7dc9e39a670e3d4da
Reviewed-on: https://gerrit.libreoffice.org/5324Reviewed-by: Norbert Thiebaud <nthiebaud@gmail.com>
Tested-by: Norbert Thiebaud <nthiebaud@gmail.com>

editeng/source/items/flditem.cxx

@@ -1127,12 +1127,7 @@ OUString SvxAuthorField::GetFormatted() const
     switch( eFormat )
     {
         case SVXAUTHORFORMAT_FULLNAME:
-        {
-            OUStringBuffer aBuf(aFirstName);
-            aBuf.append(sal_Unicode(' '));
-            aBuf.append(aName);
-            aString = aBuf.makeStringAndClear();
-        }
+            aString = aFirstName + " " + aName;
         break;
         case SVXAUTHORFORMAT_NAME:
             aString = aName;