cppCheck RedundantAssignment variable pMergeAttr

Change-Id: I5dc87ec04a7c79359c947ba2786bbe067770904c
Reviewed-on: https://gerrit.libreoffice.org/62665Reviewed-by: Markus Mohrhard <markus.mohrhard@googlemail.com>
Tested-by: Markus Mohrhard <markus.mohrhard@googlemail.com>

sc/source/ui/view/tabview2.cxx

@@ -502,7 +502,6 @@ void ScTabView::MarkCursor( SCCOL nCurX, SCROW nCurY, SCTAB nCurZ,
             SCROW nCurYOffset = 0;
             SCROW nBlockStartYOffset = 0;
             bool bBlockStartMerged = false;
-            const ScMergeAttr* pMergeAttr = nullptr;
             ScDocument* pDocument = aViewData.GetDocument();
 
             // The following block checks whether or not the "BlockStart" (anchor)
@@ -512,7 +511,7 @@ void ScTabView::MarkCursor( SCCOL nCurX, SCROW nCurY, SCTAB nCurZ,
             // selection is moving in the upperleft direction, the anchor cell will
             // move to the lower-right corner of the merged anchor cell, and so on.
 
-            pMergeAttr =
+            const ScMergeAttr* pMergeAttr =
                 pDocument->GetAttr( nBlockStartXOrig, nBlockStartYOrig, nTab, ATTR_MERGE );
             if ( pMergeAttr->IsMerged() )
             {