loplugin:returnconstant in ScGridWindow

Change-Id: I4b7cb0b5346cd21d6aa3b25dbe5e37a107b179b5
Reviewed-on: https://gerrit.libreoffice.org/59133
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

sc/source/ui/inc/gridwin.hxx

@@ -235,7 +235,7 @@ class ScGridWindow : public vcl::Window, public DropTargetHelper, public DragSou
 
     bool            HasScenarioButton( const Point& rPosPixel, ScRange& rScenRange );
 
-    bool            DropScroll( const Point& rMousePos );
+    void            DropScroll( const Point& rMousePos );
 
     sal_Int8        AcceptPrivateDrop( const AcceptDropEvent& rEvt );
     sal_Int8        ExecutePrivateDrop( const ExecuteDropEvent& rEvt );

sc/source/ui/view/gridwin.cxx

@@ -3325,7 +3325,7 @@ void ScGridWindow::UpdateInputContext()
                                 // sensitive range (Pixel)
 #define SCROLL_SENSITIVE 20
 
-bool ScGridWindow::DropScroll( const Point& rMousePos )
+void ScGridWindow::DropScroll( const Point& rMousePos )
 {
     SCCOL nDx = 0;
     SCROW nDy = 0;
@@ -3355,8 +3355,6 @@ bool ScGridWindow::DropScroll( const Point& rMousePos )
         if ( nDy != 0 )
             pViewData->GetView()->ScrollY( nDy, WhichV(eWhich) );
     }
-
-    return false;
 }
 
 static bool lcl_TestScenarioRedliningDrop( const ScDocument* pDoc, const ScRange& aDragRange)