Only call GetViewBindings once

Change-Id: I172937f7f2dd6a9a5b128777ea95271c565f3ae5
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/173437
Tested-by: Jenkins
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>

sc/source/ui/docshell/docsh4.cxx

@@ -2276,9 +2276,9 @@ void ScDocShell::GetState( SfxItemSet &rSet )
 
             case SID_NOTEBOOKBAR:
                 {
-                    if (GetViewBindings())
+                    if (SfxBindings* pBindings = GetViewBindings())
                     {
-                        bool bVisible = sfx2::SfxNotebookBar::StateMethod(*GetViewBindings(),
+                        bool bVisible = sfx2::SfxNotebookBar::StateMethod(*pBindings,
                                                                           u"modules/scalc/ui/");
                         rSet.Put( SfxBoolItem( SID_NOTEBOOKBAR, bVisible ) );
                     }