use std::swap instead of own implementation

Change-Id: Iabc0eee868a2ad5623a1ac39b26bb2bc5981e829
Reviewed-on: https://gerrit.libreoffice.org/43249Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Markus Mohrhard <markus.mohrhard@googlemail.com>

sc/inc/address.hxx

@@ -922,10 +922,7 @@ template< typename T > void PutInOrder( T& nStart, T& nEnd )
 {
     if (nEnd < nStart)
     {
-        T nTemp;
-        nTemp = nEnd;
-        nEnd = nStart;
-        nStart = nTemp;
+        std::swap(nStart, nEnd);
     }
 }