(const_)generic_proxy should inherit from GenericProxy (thanks Romain)

Author: kevinushey

inst/include/Rcpp/vector/const_generic_proxy.h

@@ -24,7 +24,7 @@ namespace Rcpp{
 namespace internal{
 
     template <int RTYPE> 
-	class const_generic_proxy{
+	class const_generic_proxy : public GenericProxy< const_generic_proxy<RTYPE> > {
 		public:
 			typedef typename ::Rcpp::Vector<RTYPE> VECTOR ;
 

inst/include/Rcpp/vector/generic_proxy.h

@@ -24,7 +24,7 @@ namespace Rcpp{
 namespace internal{
 
 	template <int RTYPE> 
-	class generic_proxy{
+	class generic_proxy : public GenericProxy< generic_proxy<RTYPE> > {
 		public:
 			typedef typename ::Rcpp::Vector<RTYPE> VECTOR ;