fix doct->docx background page settings

ASCOfficeDocxFile2/BinReader/Readers.h

@@ -6526,6 +6526,8 @@ public:
 	}
     int Read_Background(BYTE type, long length, void* poResult)
     {
+		m_oFileWriter.m_oSettingWriter.AddSetting(L"<w:displayBackgroundShape/>");
+		
 		int res = c_oSerConstants::ReadOk;
         Background* pBackground = static_cast<Background*>(poResult);