Make ~OCode an anchor again for vtable and RTTI emission

...had been lost with dd5fa4ce "declare default
dtor as virtual"

Change-Id: I30acd02c293a5ecc99f5bf4f6b1f6358ae392e93

connectivity/source/drivers/file/fcode.cxx

@@ -32,6 +32,8 @@ using namespace connectivity::file;
 using namespace ::com::sun::star::sdbc;
 using namespace ::com::sun::star::sdb;
 
+OCode::~OCode() = default;
+
 OOperandRow::OOperandRow(sal_uInt16 _nPos, sal_Int32 _rType)
     : OOperand(_rType)
     , m_nRowPos(_nPos)

connectivity/source/inc/file/fcode.hxx

@@ -45,7 +45,7 @@ namespace connectivity
         {
         public:
             //virtual dtor to allow this to be the root of the class hierarchy
-            virtual ~OCode() = default;
+            virtual ~OCode();
 #if !defined _MSC_VER || _MSC_VER >= 1900
             //but that disables the default move ctor
             OCode(OCode&&) = default;