sw::Ring: simplify '*&x' to just 'x'

Change-Id: I75d25c54c0c3e2c913ea0f2f36bdd4fc262fd088
Reviewed-on: https://gerrit.libreoffice.org/50918Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>

sw/inc/ring.hxx

@@ -186,8 +186,8 @@ namespace sw
                 // actually un-merge in this case!
                 assert(m_pStart->m_pPrev != aDestRing.m_pStart);
                 assert(m_pStart != aDestRing.m_pStart->m_pPrev);
-                std::swap(*(&m_pStart->m_pPrev->m_pNext), *(&aDestRing.m_pStart->m_pPrev->m_pNext));
-                std::swap(*(&m_pStart->m_pPrev), *(&aDestRing.m_pStart->m_pPrev));
+                std::swap(m_pStart->m_pPrev->m_pNext, aDestRing.m_pStart->m_pPrev->m_pNext);
+                std::swap(m_pStart->m_pPrev, aDestRing.m_pStart->m_pPrev);
             }
     };