guard against missing alignment property

(cherry picked from commit 7e341379)
Reviewed-on: https://gerrit.libreoffice.org/20543Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>
(cherry picked from commit 3b9e2bb2)

Change-Id: I1d4825c2136e516baf759f4b2c40c911547b93d7
Reviewed-on: https://gerrit.libreoffice.org/20544Reviewed-by: David Tardon <dtardon@redhat.com>
Tested-by: David Tardon <dtardon@redhat.com>

lotuswordpro/source/filter/lwppara.cxx

@@ -385,19 +385,23 @@ void LwpPara::RegisterStyle()
             switch(PropType)
             {
             case PP_LOCAL_ALIGN:
+            {
+                LwpAlignmentOverride *pAlignment = static_cast<LwpParaAlignProperty*>(pProps)->GetAlignment();
+                if (pAlignment)
                 {
                     if (!rParaStyle.GetAlignment())
-                    OverrideAlignment(NULL,static_cast<LwpParaAlignProperty*>(pProps)->GetAlignment(),pOverStyle);
+                        OverrideAlignment(nullptr, pAlignment, pOverStyle);
                     else
                     {
-                    boost::scoped_ptr<LwpAlignmentOverride> const pAlign(
+                        std::unique_ptr<LwpAlignmentOverride> const pAlign(
                                 rParaStyle.GetAlignment()->clone());
                         OverrideAlignment(pAlign.get(),
-                            static_cast<LwpParaAlignProperty*>(pProps)->GetAlignment(),
+                                pAlignment,
                                 pOverStyle);
                     }
                 }
                 break;
+            }
             case PP_LOCAL_INDENT:
             {
                 noIndent = false;