sw: fix divide by 0

See https://crashreport.libreoffice.org/stats/signature/operator/(Fraction%20const%20&,Fraction%20const%20&)

Change-Id: Ia93e2969d6eb0bde71c8419f2aa90bb7aa231f61
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/150553
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Jenkins
Reviewed-by: Xisco Fauli <xiscofauli@libreoffice.org>
(cherry picked from commit d01dae0cbabc27f2ff2a242316206067cff73cf8)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/150563
Reviewed-by: Michael Stahl <michael.stahl@allotropia.de>

1 files changed, 7 insertions, 2 deletions

diff --git a/sw/source/uibase/wrtsh/wrtsh1.cxx b/sw/source/uibase/wrtsh/wrtsh1.cxx
index 6a17c6e80458..fdf3f6082587 100644
--- a/sw/source/uibase/wrtsh/wrtsh1.cxx
+++ b/sw/source/uibase/wrtsh/wrtsh1.cxx
@@ -900,8 +900,13 @@ void SwWrtShell::CalcAndSetScale( svt::EmbeddedObjectRef& xObj,
     }
     else
     {
-        aArea.Width ( tools::Long( aArea.Width()  / pCli->GetScaleWidth() ) );
-        aArea.Height( tools::Long( aArea.Height() / pCli->GetScaleHeight() ) );
+        tools::Long nWidth(pCli->GetScaleWidth());
+        tools::Long nHeight(pCli->GetScaleHeight());
+        if (nWidth && nHeight)
+        {
+            aArea.Width ( aArea.Width()  / nWidth );
+            aArea.Height( aArea.Height() / nHeight );
+        }
     }
 
     pCli->SetObjAreaAndScale( aArea.SVRect(), aScaleWidth, aScaleHeight );