Fix tdf#138373 scrollbars can now actually be nullptr

Change-Id: I224969de51a1d7e0176facb503a5b27cd8da530c
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/106265
Tested-by: Jenkins
Reviewed-by: Thorsten Behrens <Thorsten.Behrens@CIB.de>

1 files changed, 4 insertions, 2 deletions

diff --git a/vcl/source/window/tabpage.cxx b/vcl/source/window/tabpage.cxx
index 259b0085f12d..0ee256425709 100644
--- a/vcl/source/window/tabpage.cxx
+++ b/vcl/source/window/tabpage.cxx
@@ -259,7 +259,8 @@ void TabPage::SetScrollTop( tools::Long nTop )
 {
     Point aOld = mnScrollPos;
     lcl_Scroll( mnScrollPos.X() , mnScrollPos.Y() - nTop );
-    m_pHScroll->SetThumbPos( 0 );
+    if( m_pHScroll )
+        m_pHScroll->SetThumbPos( 0 );
     // new pos is 0,0
     mnScrollPos = aOld;
 }
@@ -267,7 +268,8 @@ void TabPage::SetScrollLeft( tools::Long nLeft )
 {
     Point aOld = mnScrollPos;
     lcl_Scroll( mnScrollPos.X() - nLeft , mnScrollPos.Y() );
-    m_pVScroll->SetThumbPos( 0 );
+    if( m_pVScroll )
+        m_pVScroll->SetThumbPos( 0 );
     // new pos is 0,0
     mnScrollPos = aOld;
 }