fix cast to implementation objects failure from some vba objects

old calls attempting to cast to implementation objects now fail ( and crash on access ) because we now wrap some objects via a aggregation proxy. This patch fixes this

oovbaapi/ooo/vba/excel/XWorkbook.idl

@@ -27,7 +27,7 @@
 #ifndef __ooo_vba_excel_XWorkbook_idl__
 #define __ooo_vba_excel_XWorkbook_idl__
 
-#include <com/sun/star/uno/XInterface.idl>
+#include <com/sun/star/lang/XUnoTunnel.idl>
 #include <ooo/vba/XHelperInterface.idl>
 
 //=============================================================================
@@ -40,8 +40,11 @@ interface XWorksheet;
 interface XWorksheets;
 interface XStyles;
 
-interface XWorkbook : com::sun::star::uno::XInterface
+interface XWorkbook
 {
+
+    interface ::com::sun::star::lang::XUnoTunnel;
+
     [attribute, readonly] boolean ProtectStructure;
     [attribute, readonly] XWorksheet ActiveSheet;
     [attribute, readonly] string  CodeName;

oovbaapi/ooo/vba/excel/XWorksheet.idl

@@ -27,7 +27,7 @@
 #ifndef __ooo_vba_excel_XWorksheet_idl__
 #define __ooo_vba_excel_XWorksheet_idl__
 
-#include <com/sun/star/uno/XInterface.idl>
+#include <com/sun/star/lang/XUnoTunnel.idl>
 #include <ooo/vba/XHelperInterface.idl>
 #include <com/sun/star/script/XInvocation.idl>
 #include <com/sun/star/container/XNamed.idl>
@@ -49,6 +49,7 @@ interface XWorksheet
     interface ::ooo::vba::XHelperInterface;
     interface ::com::sun::star::script::XInvocation;
     interface ::com::sun::star::container::XNamed;
+    interface ::com::sun::star::lang::XUnoTunnel;
 
     [attribute] long Visible;
     [attribute, readonly] long StandardHeight;