CppCheck cleaning : avoid unnecessary affectation

Change-Id: I3803c5898f94e2786ba6fa464b503f36f5a449ab
Reviewed-on: https://gerrit.libreoffice.org/14847Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

dbaccess/source/ui/querydesign/JoinTableView.cxx

@@ -495,8 +495,8 @@ void OJoinTableView::EnsureVisible(const Point& _rPoint,const Size& _rSize)
         if (nScrollX)
             bVisbile = ScrollPane(nScrollX, true, true);
 
-        if (nScrollY)
-            bVisbile = bVisbile && ScrollPane(nScrollY, false, true);
+        if (nScrollY && bVisbile)
+            ScrollPane(nScrollY, false, true);
     }
 }