ofz#3445 exception thrown through XMLImpRubyContext_Impl dtor

 #0 in __cxa_throw () at /lib64/libstdc++.so.6
 #1 in SwXFootnote::createTextCursorByRange(com::sun::star::uno::Reference<com::sun::star::text::XTextRange> const&) (this=0xa21ef0, xTextPosition=uno::Reference to (SwXTextRange *) 0xa18cd8) at core/sw/source/core/unocore/unoftn.cxx:459
 #2 in XMLImpRubyContext_Impl::~XMLImpRubyContext_Impl() (this=0xa18bf0, __in_chrg=<optimized out>)
    core/xmloff/source/text/txtparai.cxx:641
 #3 in XMLImpRubyContext_Impl::~XMLImpRubyContext_Impl() (this=0xa18bf0, __in_chrg=<optimized out>)
    core/xmloff/source/text/txtparai.cxx:646
 #4 in cppu::OWeakObject::release() (this=0xa18bf0) at core/cppuhelper/source/weak.cxx:232

Change-Id: I071dc65751724f96b2386dea4f26a6ef476f4ef6
Reviewed-on: https://gerrit.libreoffice.org/42551Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

xmloff/source/text/txtparai.cxx

@@ -540,7 +540,7 @@ public:
             XMLHints_Impl& rHints,
             bool& rIgnLeadSpace );
 
-    virtual ~XMLImpRubyContext_Impl() override;
+    virtual void EndElement() override;
 
     virtual SvXMLImportContext *CreateChildContext(
             sal_uInt16 nPrefix, const OUString& rLocalName,
@@ -633,7 +633,7 @@ XMLImpRubyContext_Impl::XMLImpRubyContext_Impl(
     }
 }
 
-XMLImpRubyContext_Impl::~XMLImpRubyContext_Impl()
+void XMLImpRubyContext_Impl::EndElement()
 {
     const rtl::Reference < XMLTextImportHelper > xTextImport(
         GetImport().GetTextImport());