ofz#4548 infinite regress in GetUsePrinterSettings

Change-Id: Iebd51c8724eebb942af45f3be24718a7a1278183
Reviewed-on: https://gerrit.libreoffice.org/45991Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

lotuswordpro/source/filter/lwplayout.cxx

@@ -81,6 +81,7 @@ LwpVirtualLayout::LwpVirtualLayout(LwpObjectHeader const &objHdr, LwpSvStream* p
     , m_bGettingIsProtected(false)
     , m_bGettingMarginsValue(false)
     , m_bGettingExtMarginsValue(false)
+    , m_bGettingUsePrinterSettings(false)
     , m_nAttributes(0)
     , m_nAttributes2(0)
     , m_nAttributes3(0)
@@ -1405,19 +1406,27 @@ XFBGImage* LwpMiddleLayout::GetXFBGImage()
 */
 bool LwpMiddleLayout::GetUsePrinterSettings()
 {
+    if (m_bGettingUsePrinterSettings)
+        throw std::runtime_error("recursion in layout");
+    m_bGettingUsePrinterSettings = true;
+
+    bool bRet = false;
+
     if(m_nOverrideFlag & OVER_SIZE)
     {
-        return (m_nAttributes3 & STYLE3_USEPRINTERSETTINGS) != 0;
+        bRet = (m_nAttributes3 & STYLE3_USEPRINTERSETTINGS) != 0;
     }
     else
     {
         rtl::Reference<LwpObject> xBase(GetBasedOnStyle());
         if (LwpMiddleLayout* pLay = dynamic_cast<LwpMiddleLayout*>(xBase.get()))
         {
-            return pLay->GetUsePrinterSettings();
+            bRet = pLay->GetUsePrinterSettings();
         }
     }
-    return false;
+
+    m_bGettingMarginsValue = false;
+    return bRet;
 }
 
 //Check whether there are contents in the layout

lotuswordpro/source/filter/lwplayout.hxx

@@ -226,6 +226,7 @@ protected:
     bool m_bGettingIsProtected;
     bool m_bGettingMarginsValue;
     bool m_bGettingExtMarginsValue;
+    bool m_bGettingUsePrinterSettings;
     sal_uInt32 m_nAttributes;
     sal_uInt32 m_nAttributes2;
     sal_uInt32 m_nAttributes3;