coverity#1371270 Missing move assignment operator

Change-Id: I9a5656fa3a4d4283a1daec957da9d909390d9eb2

sw/source/core/doc/DocumentContentOperationsManager.cxx

@@ -4516,7 +4516,7 @@ bool DocumentContentOperationsManager::CopyImpl( SwPaM& rPam, SwPosition& rPos,
     {
         assert(*pCopyPam->GetPoint() == rPos);
         // the Node rPos points to may be deleted so unregister ...
-        rPos.nContent = SwIndex(nullptr);
+        rPos.nContent.Assign(nullptr, 0);
         lcl_DeleteRedlines(rPam, *pCopyPam);
         rPos = *pCopyPam->GetPoint(); // ... and restore.
     }

sw/source/core/text/frmcrsr.cxx

@@ -689,7 +689,7 @@ bool SwTextFrame::LeftMargin(SwPaM *pPam) const
             nIndx = 0;
         }
     }
-    pPam->GetPoint()->nContent = SwIndex( pFrame->GetTextNode(), nIndx );
+    pPam->GetPoint()->nContent.Assign(pFrame->GetTextNode(), nIndx);
     SwTextCursor::SetRightMargin( false );
     return true;
 }
@@ -730,7 +730,7 @@ bool SwTextFrame::RightMargin(SwPaM *pPam, bool bAPI) const
                 --nRightMargin;
         }
     }
-    pPam->GetPoint()->nContent = SwIndex( pFrame->GetTextNode(), nRightMargin );
+    pPam->GetPoint()->nContent.Assign(pFrame->GetTextNode(), nRightMargin);
     SwTextCursor::SetRightMargin( !bAPI );
     return true;
 }
@@ -839,8 +839,7 @@ bool SwTextFrame::UnitUp_( SwPaM *pPam, const SwTwips nOffset,
                     nTmpOfst = nStart;
                     aSet.SetRight( true );
                 }
-                pPam->GetPoint()->nContent =
-                      SwIndex( const_cast<SwTextFrame*>(this)->GetTextNode(), nTmpOfst );
+                pPam->GetPoint()->nContent.Assign(const_cast<SwTextFrame*>(this)->GetTextNode(), nTmpOfst);
                 return true;
             }
 

sw/source/core/undo/untbl.cxx

@@ -2769,7 +2769,7 @@ SwUndo* SwUndoTableCpyTable::PrepareRedline( SwDoc* pDoc, const SwTableBox& rBox
             }
         }
         else
-            aInsertEnd.nContent = SwIndex( nullptr );
+            aInsertEnd.nContent.Assign(nullptr, 0);
     }
     // For joined (merged) contents the start of deletion and end of insertion are identical
     // otherwise adjacent nodes.